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STATE  OF  ILLINOIS 
DEPARTMENT  OF  REGISTRATION  AND  EDUCATION 

A.  M.  SHELTON,  Director 

DIVISION  OF  THE 
STATE  GEOLOGICAL  SURVEY 

M.  M.  LEIGHTON,  Chief 
REPORT  OF  INVESTIGATIONS— NO.   1 

FURTHER  CONSIDERATION  OF  PROSPECTS 

FOR  OIL 

IN  THE  DECATUR  AREA 

BY 
D.  M.  COLLINGWOOD 


"^^^ 


PRINTED  BY  AUTHORITY  OF  THE  STATE  OF  ILLINOIS 


URBANA,  ILLINOIS 
1924 


Illinois  State  Journal.  Co. 
Springfield,  Illinois 

19  2  4 


19527  —  1500 


957 

/zj.  /-=2  3 


FURTHER  CONSIDERATION  OF  PROSPECTS  FOR  OIL 
IN  THE  DECATUR  AREA 

By  D.  M.   Collingwood 


OUTLINE 

PAGE 

Introduction     5 

Purpose   of    report 5 

Data  on  which  study  is  based 5 

General  Geology    5 

Geologic   section 5 

Regional  structure   6 

Local    structural    closures 6 

Stratigraphy  8 

Possible  petroliferous  horizons 9 

Importance  of  sampling  formations  and  waters 11 

Character  of  oil 11 

Detailed    structural    considerations    and    recommendations    for    future 

prospecting   12 

Introduction    12 

Areas  of  possible  local  doming 12 

Decatur  area    13 

General  description    13 

Recommendations  for  future  drilling 14 

Other  possible  areas  of  local  doming 14 

Conclusions  15 

Appendix,  representative  logo 16 

Christian  County    16 

Macon  County    24 

Moultrie  County    41 

Piatt  County 43 

Sangamon   County    44 

ILLUSTRATIONS 

PLATE 

I.     Structure  map  of  Decatur  and  vicinity  showing  contours  on  No.  5 
coal  based  on  sea  level  datum,   with   superimposed   convergence 

( isochore  lines   9 

FIGURE 

1.     Cross   section   in  the   Decatur  area   to   show   local    disconformable 
irregularities  at  the  top  and  bottom  of  the  Chester  series  and  of 

the  Sweetland  Creek  shale 7 


Digitized  by  the  Internet  Archive 

in  2012  with  funding  from 

University  of  Illinois  Urbana-Champaign 


http://archive.org/details/furtherconsidera5571coll 


INTRODUCTION 

PURrOSE  of  Eeport 

A  pamphlet  entitled  "Notes  on  Prospects  in  the  Decatur  Area" 
was  published  by  the  Illinois  Geological  Survey  in  March,  1922.  Since 
that  time,  some  additional  drilling  has  been  done  in  the  area  and 
accurate  curb  elevations  of  the  tests  for  which  there  are  records  avail- 
able have  been  obtained.  These  data  now  afford  a  somewhat  more  satis- 
factory basis  on  which  to  formulate  correlations  and  interpret  the 
local  structure.  Attention  is  called  to  the  accommpanying  map 
(PL  I)  showing  the  suggested  irregularities  of  the  local  structure 
which  will  indicate  in  advance  of  further  drilling  the  locations  of  greater 
promise,  so  that  any  further  exploratory  drilling  can  be  undertaken  to 
test  the  existence  of  complete  closure  in  the  shallow  horizons  before 
undertaking  the  deep  tests. 

Data  ox  Which  Study  Is  Based 

Copies  of  representative  logs  available  for  this  area,  including  those 
published  in  the  previously  mentioned  Press  Bulletin,  are  grouped  by 
counties  in  the  appendix.  On  the  map,  Plate  I,  those  borings  for  which 
records  are  included  are  shown  by  certain  symbols  accompanied  by 
numbers  designating  corresponding  logs  in  the  appendix.  Levels  were 
run  from  points  of  known  elevation  on  the  railroads  and  from  United 
States  Geological  Survey  bench  marks  to  obtain  curb  elevations  of  the 
drill  holes. 

GENERAL  GEOLOGY 

Geologic  Section 

For  the  convenience  of  the  reader,  the  following  generalized  sec- 
tion of  strata  penetrated  in  the  Decatur  area  is  given.  As  shown  in  the 
section,  the  horizon  that  has  given  good  shows  of  oil  is  encountered 
about  20  to  40  feet  below  the  top  of  the  Silurian  ("Niagaran")  lime- 
stone at  a  total  depth  of  about  2000  feet. 


OIL   I.\    THE   DECATUR  AEEA 


Thickness 
Feet 


.870 


Pleistocene  system 

Loess  and  drift 
Pennsylvanian  system 
McLeansboro       i 

Carbondale  V  "Coal  Measures" 

Pottsville  ?  \ 

Mississippian  system 

Upper   Mississippian  sub-system 

Chester  series    225 

Lower  Mississippian  sub-system   (upper  part — "Big  Lime") 
Spergen  \ 

Osage  [    725 

Kinderhook      ) 

Sweetland  Creek    (chocolate  shale) 165 

Devonian  system   ? 

Silurian  system   (oil  in  upper  part) 
Niagaran  / 

Alexandrian     \ 
Ordovician  system 

Maquoketa  185 

Trenton     300  + 


.400 


Depth 
Feet 


870 


1095 


1820 

1985 
f 


2385 

2570 
2870  + 


Regional  Structure 

All  of  the  formations  with  the  exception  of  the  Pennsylvanian  and 
upper  Mississippian  rocks  have  nearly  constant  thickness  in  the  holes 
that  have  gone  to  the  Silurian  in  the  immediate  area.  The  Pennsyl- 
vanian rocks  and  to  a  lesser  degree,  the  upper  Mississippian  strata, 
thicken  basinward  below  the  surface  deposits,  progressively  towards  the 
south  and  east,  the  direction  of  the  regional  dip. 

In  general,  the  dip  of  the  shallow  rocks  in  Illinois  parallels  that  of 
the  deeper  ones,  but  in  this  area,  due  to  pre-Chester  deformation  and  the 
thickening  and  increase  in  number  of  formations  to  the  south  and  east, 
the  Pennsylvanian  and  Chester  have  somewhat  less  dip  than  the  under- 
lying rocks.  Local  disconformable  irregularities  masking  the  expression 
of  true  dip  occur  at  the  top  and  bottom  of  the  Chester  series  as  shown 
in  figure  1.  The  same  sort  of  situation  holds  true,  although  to  a  h 
degree,  for  the  top  and  bottom  of  the  Sweetland  Creek  shale.  In  the 
immediate  vicinity  of  Decatur,  the  Chester  seems  to  thicken  slightly 
also  towards  the  northeast  ahum-  the  regional  strike  of  the  rocks. 


Local  Structural  Closures 

Where  local  flexures  are  imposed  on  non-parallel  strata  conforming 
with  the  general  basinward  dip,  the  flexure  of  the  folds  may  he  sufficient 
to  show  some  reversal  or  closure  in  the  upper  beds,  while  the  lower  ones 
may  lack  sufficient  curvature  to  show  anything  more  than  a  flattening 
of  the   regional   dip.     Furthermore,  where  the   folding   is   sufficient  to 


OIL  IN   THE   DECATUR    AKEA 


500- 


600 


700- 


800" 


900 


1000- 


1100 


1200- 


1300 


1400 


Shale 


Limestone 


Sand 


,<** 


CV^ 


J    i   |  wzmmm 


Red  rock 


"-5J 


Ctee« 


19 


■  p  —i  = 


Figure  1.  Cross  section  in  the  Decatur  area  to  show  local  irregularities 
in  contact  surfaces  between  disconiormable  beds  at  the  top  and  bottom  of  the 
Chester  series  and  of  the  Sweetland  Creek  shale. 

No.  3.  Lincoln  Oil  and  Gas  Co.,  well  No.  3,  SE.  %,  SE.  %,  sec.  32, 
T.  17  N.,  R.  2  E. 

No.  6.  Lincoln  Oil  and  Gas  Co.,  well  No.  2,  SW.  *4,  NE.  %,  sec.  5,  T.  16 
N,  R.  2  E. 

No.  5.  Lincoln  Oil  and  Gas  Co.,  well  No.  1,  SE.  14,  NE.  14,  sec.  5,. 
T.  16  N.,  R.  2  E. 

No.  8.  Atlantic  Oil  and  Gas  Co.,  Bledsoe  farm,  No.  1,  SW.  %,  SE.  %, 
sec.  5,  T.  16  N.,  R.  2  E. 

No.  19.  Mt.  Auburn  Oil  and  Gas  Co.,  well  No.  2,  NW.  14,  NW.  %,  sec. 
25,  T.  15  N.,  R.  2  W. 


Oil,    IN    THE    DECAl'Ult   AREA 


provide  complete  reversal  in  the  dip  of  the  lower  beds,  the  cresl  of  the 
doming  will  probably  not  he  found  directly  below  that  of  the  upper  beds, 
but  slightly  offset  in  the  direction  up  the  regional  dip. 

These  point-  should  he  remembered  iii  lest  drilling  to  considerable 
depth,  a  structural  dome  or  anticline  which  has  been  revealed  by  cor- 
relating shallow  horizons.  In  the  absence  of  sufficient  record-  of  deep 
drilling,  structure  contours  drawn  on  a  shallow  key  horizon  are  helpful 
in  locating  tests  on  favorable  deep  structures,  although  the  latter  may  he 
modified   in   degree  and   position. 

Stbatigbapht. 

Few  borings  in  the  area  bave  gone  deeper  than  the  Pennsylvanian 
system.  The  Pennsylvanian  rocks  directly  underlying  the  glacial  drift 
extend  to  a  depth  of  about  900  or  1000  feet.  In  the  absence  of  cores 
and  thorough  sampling,  the  most  belpfu]  guides  in  correlating  logs  of 
shallow  test  borings  are  the  limestones,  the  coal  beds  and  local  red  and 
black  shales.  The  chief  coal  beds  in  their  order  of  penetration,  are  NoS. 
7,  (>.  and  •">,  which  occur  with  vertical  intervals  of  25  to  150  feet  and  at 
a  depth  between  350  and  1050  feet,  depending  on  location  and  surface 
elevation.  Log  No.  23  in  sec.  1,  T.  11  X.,  El.  '2  W.,  listed  in  the  ap- 
pendix is  a  typical  record  of  the  coal  tests  in  northern  Christian  County, 
and  shows  all  three  coals  with  the  addition  of  a  local  coal  between  Xo.  (i 
and  Xo.  5.  Limestone  cap  rocks  are  locally  associated  with  the  Xo.  ^ 
and  No.  5  coals,  hul  the  most  important  and  persistent  limestone  member 
associated  with  the  coal  seams  is  the  fossiliferous  limestone  cap  of  Xo.  (i 
coal.  There  are  two  other  main  Pennsylvanian  limestone  horizons  en- 
countered. The  one  at  150  to  '.'.Mi  feet  above  No.  5  coal  is  associated 
with  and  often  replaced  by  a  thin  bony  coal  formation,  which  is  a  good 
horizon  marker,  and  another,  probably  the  Carlinville  and  Shoal  Creek 
limestone  horizon  is  found  at  250  to  iOO  feet  above  Xo.  5  coal.  The 
Carlinville  and  Shoal  Creek  limestone  horizon  which  generally  com- 
prises several  beds  separated  by  shale,  is  ,ery  persistent  hut  is  not  such 
a  good  index  of  structure  as  either  No.  5  or  No.  (i  coal  because  of  its 
shallower  position  in  the  rock  section  and  because  generally  some  beds 
are  unrecognized  and  therefore  not  accurately  logged  In  drillers.  Toward 
the  south  and  east  of  the  area  mapped,  another  persistent  limestone, 
probably  equivalent  to  the  Carthage  or  New  Haven,  is  found  about  250 
feet  above  the  Carlinville.  Red  shales  lying  between  30  and  70  feet 
above  No.  ii  coal  in  the  Christian  County  area  and  about  50  to  100 
above  No.  (i  coal  in  the  Decatur  area  are  also  helpful  locally  in  correlat- 
ing drilling  records. 


ILLINOIS    STATE    GEOLOGICAL  SURVEY 


REPORT  OF   INVESTIGATIONS    NO.    1.    PLATE   NO.    1 


R.2  E. 


LEGEND 


-^-  Churn  drill  dry  hole  "\  Isochore  or  convergent      N     Structure  contours  on  Jfo.<r>  coal 

_  _,           .    „    ,          .    .,  .  lines  joining  point)  of 

•  Churn  drill  show  of  oil  ^        eq aaL  Meroal  between 

©  Diamond  drill  (.oalUst  \        Ho  5  and  Jfo.6  coals 

■  Coal  shaft 


/0fo    Promising  area  for  exploration 


R.3W. 


R.2W. 


R.1E. 


Structure  map  of  Decatur  and  vicinity  showing  contours  on  No.  5  coal,  with  reference  to  aea  level,  with  superimposed  convergence   (isochore)    lines. 
Areas  which  are  cross  hatched  show  favorable  structural  areas  for  further  exploration. 


OIL   IX    THE   DECATUU   AREA  !) 

In  the  north  part  of  Christian  County,  No.  6  coal  is  mined  and 
can  be  traced  easily  towards  Macon  County  by  comparing  a  number  of 
coal  test  records  most  of  which  note  No.  I  and  No.  6  coals,  some  of 
which  are  deep  enough  to  show  the  local  coal  immediately  below  No.  6 
and  a  few  of  which  penetrate  No.  5  coal.  Then  there  is  an  area  between 
the  south  line  of  Macon  County  and  the  city  of  Decatur  in  which  records 
of  the  coals  are  scarce.  In  this  area  No.  (J  coal  is  probably  considerably 
thinner  and  may  be  absent. 

In  the  Decatur  area  a  coal  which  has  been  called  No.  51  coal,  the 
equivalent  of  the  coal  mined  in  the  Springfield  and  Peoria  regions,  has 
been  mined  for  a  number  of  years.  This  coal  is  present  east  and  south- 
east of  Decatur,  but  is  not  recorded  in  the  oil  tests  west  and  northwest 
of  the  city,  with  the  exception  of  the  boring  in  sec.  8,  T.  l(i  N.,  B.  2 
E.  (Eecord  No.  9,  Macon  County)  in  which  two  feet  of  coal  believed  to 
be  No.  5  was  reported. 

In  Christian  County,  notably  in  Tps.  13  and  1-1  N.  and  Rs.  1  and  2 
W.,  a  coal  is  found  locally  about  25  or  30  feet  below  No.  6.  This  has 
formerly  been  correlated  as  No.  5,  and  is  probably  the  same  coal  that  is 
mined  at  Moweaqua.1  In  the  surrounding  area,  the  interval  between 
No.  6  and  No.  5  appears  to  have  a  very  definite  relation  to  the  regional 
structure.  It  is  about  60  feet  at  Decatur  and  southwestward,  at  right 
angles  to  the  direction  of  the  dip  of  the  rocks.  The  interval  decreases 
up  the  dip  towards  Sangamon  County,  and  increases  basinward  towards 
Moultrie  and  Shelby  counties.  Thus,  the  interval  between  No.  C  and 
No.  5  coals  at  Mechanicsburg  is  about  30  feet,  and  at  Assumption  it  is 
about  130  feet.  Isochore  or  convergence  lines  joining  points  of  equal 
interval  between  No.  6  and  No.  5  coal  are  shown  on1  Plate  I.  From  an 
examination  of  these  isochore  lines  it  is  evident  that  a  coal  occurring 
only  25  to  30  feet  below  No.  6  in  Tps.  13  and  14  N.,  Rs.  1  and  2  W. 
is  probably  not  the  true  No.  5  coal,  but  must  be  an  extra  coal  bed  of 
local  development. 

POSSIBLE   PETEOLIFEEOUS    HORIZONS 

Commercial  quantities  of  oil  and  gas  might  be  found  in  the 
shallower  sands  of  the  Pennsylvanian  and  Upper  Mississippian  (Chester) 
strata,  should  there  be  any  distinct  local  doming,  but  the  drilling  of 
the  numerous  coal  tests  and  other  holes  shown  on  the  map  has  failed  to 
show  any  oil  in  these  shallower  formations. 


1  Kay.  Fred  H.,   Coal   resources  of  District  VII,   111.  Mining   Investigations  Bull. 
11,  pp.  205,   215,   1915. 


10  OIL   IX   THE   DECATUE   Ai;i:\ 

Below  the  Chester  beds,  the  next  possible  oil  horizons  are  a 
and  below  the  dark  chocolate  Sweetland  Creek  shale  at  the  base  of  the 
Mississippian.  Xu  oil  has  yet  been  discovered  above  the  shale  in  this 
area,  although  the  Carper  sand  recently  found  productive  at  this 
horizon  in  the  Martinsville  held  of  Clark  County.  Illinois,  may  be 
present  Ideally.  A  very  fine  grained  sandstone,  which  might  be  called 
a  siltstone,  lies  about  LOO  to  •">**<>  feet  above  the  top  of  the  Sweetland 
Creels  -hale.  Sand  grains  are  also  round  in  lesser  amounts  in  the 
samples  from  the  formation  about  50  to  150  feet  above  the  Sweetland 
Creek   shah'. 

Indications  of  oi]  accumulation  in  this  area  have  been  obtained 
from  the  upper  portion  of  the  Silurian  limestone  which  lies  directly 
below  the  Sweetland  Creek  shale,  and  is  commonly  referred  to  as  the 
"Niagara".  Where  the  upper  20  feet  of  this  formation  has  been  pene- 
trated in  the  Decatur  area,  it  is  a  dense,  white,  hard,  cherty  limestone 
interbedded  with  some  cream  colored  dolomitic  strata.  Considerable 
amounts  of  white  to  blue,  translucent  chert  appear  to  he  distributed 
irregularly  through  the  dolomitic  limestone  \h-i\<  as  well  as  being  inter 
bedded  with  them.  This  upper  portion  of  the  dense  white  limestone  has 
not  proved  oil  bearing,  but  immediately  below  it,  the  limestone  becomes 
more  dolomitic  and  softer,  although  a  large  amount  of  chert  is  -till 
present.  Twenty-five  feet  of  this  formation  showed  oil  in  the  No.  i  well 
of  the  Lincoln  Oil  and  (las  Company  (Record  No.  5,  Macon  County). 
At  a  depth  of  approximately  (id  Feet  in  the  limestone,  the  hull' 
dolomitic  beds  give  place  to  more  uniform,  gray  dolomitic  limestone  with 
less  chert  in  which  oil  shows  have  not  been  obtained.  The  Lincoln  Oil 
and  Gas  Company  No.  2  well  (Record  No.  (i,  Macon  County)  was 
drilled  considerably  deeper  hut  no  oil  was  found  in  the  Silurian  and  only 
a  trace  reported  in  the  upper  portion  of  the  Trenton.  In  the  No.  .">  well 
of  the  Lincoln  Oil  and  Gas  Company  (Record  No.  :!,  Macon  County) 
oil  showed  at  depths  of  2  1  feet  and  :'>:!  feet  below  the  top  of  the 
Silurian  limestone.  The  oil  is  contained  apparently  in  the  hull',  slightly 
porous,  dolomitic  beds  between  20  and  (in  feet  helow  the  base  id'  the 
Sweetland  Creek  shale.  Dolomitic  limestone  is  commonly  porous  due 
to  the  shrinkage  in  size  id'  crystals  resulting  from  the  chemical  replace- 
ment of  calcium  carbonate  by  the  more  dense  magnesium  carbonate. 

The  large  amount  of  chert  present  as  irregular  masses,  stringers 
and  beds  retards  drilling.  The  chert  has  probably  filled  some  of  the 
intercrystalline  interstices  that  result  from  dolomitization.  Before  the 
deposition  of  the  overlying  Sweetland  Creek  shah',  the  Silurian  dolomi- 
ti/eil  limestone  was  subjected  to  erosion.  During  this  time  it  is  prob- 
able that    solution  cavities,  some  of  them    quite    large,    were    formed    by 


OIL  IN   THE  DECATUB   AREA  11 

percolating  surface  water.  At  the  same  time,  possibly  at  slightly  greater 
depth,  some  deposition  from  solution  might  have  occurred,  due  to  the 
mixing  of  waters  or  other  causes,  resulting  in  further  cementation  or 
tilling  of  the  small  pore  spaces  caused  by  dolomitization. 

In  well  Xo.  3  of  Lincoln  Oil  and  Gas  Company  a  cavity  containing 
no  gas.  oil,  or  water,  and  into  which  drilling  water  and  cuttings  dis- 
appeared was  encountered  at  2005  feet.  Later,  when  the  shot  was  being 
tamped,  considerable  water  had  to  he  run  in  to  till  the  cavity  hefore 
the  water  lose  in  the  hole.  The  existence  of  this  cavity  containing 
neither  gas  nor  fluid  seems  to  indicate  a  lack  of  continuity  of  the  pores 
in  this  limestone.  This  is  further  borne  out  by  the  occurrence  of  oil  and 
some  water  under  slight  pressure  in  the  Xo.  1  well  of  the  Lincoln  Oil 
and  (las  Company  only  a  quarter  of  a  mile  distant.  The  latter  also 
shows  that  fluid  under  pressure  exists  locally  in  some  beds  of  this 
dolomitic  limestone.  Apparently  the  land  surface  was  low  and  the 
percolation  of  surface  waters  extended  only  to  a  shallow  depth,  giving 
a  narrow  vertical  range  to  the  zone  of  solution  cavities.  Within  the 
shallow  zone,  the  porosity  of  the  dolomitic  beds  has  been  modified  and 
restricted  by  the  irregular  distribution  of  the  chert  ami  the  character  of 
the  bedding  planes. 

IMPORTANCE  OF  SAMPLING    FORMATIONS  AND  WATERS 

Very  little  bottom  water  is  found  with  the  oil  in  Well  Xo.  1  of 
the  Lincoln  Oil  and  Gas  Company,  hut  there  is  sufficient  pressure  to 
bring  the  fluid  in  the  casing  to  the  surface.  The  presence  of  water 
under  pressure  in  the  Silurian  limestone  and  a  general  similarity  to  the 
chemical  character  of  water  commonly  associated  with  oil,  would  prob- 
ably serve  as  good  criteria  in  prospecting  for  local  accumulations  of  oil 
on  possible  favorable  structures.  It  is  recommended  that  in  the  future, 
operators  in  this  area  sample  all  waters  encountered,  including  water 
produced  with  the  oil.  The  State  Geological  Survey  is  willing  to  supply 
the  containers  for  these  samples  for  use  in  connection  with  a  state-wide 
study  of  oil-field  waters,  from  which  it  is  hoped  much  benefit  will  result 
to  the  operators  regarding  various  oil-field  exploration  and  operation 
problems. 

CHARACTER  OF  THE  OIL 

The  oil  in  the  Xo.  1  well  of  the  Lincoln  Oil  and  Gas  Company 
(Record  Xo.  5,  Macon  County)  is  of  a  good  "live"  quality,  and  is  re- 
ported as  testing  39.5°  Baume.  The  amount  showing  when  the  well 
was  shot  was  indicative  of  a  well  that   would  make  a  few  barrels  initial 


12  OIL    IN    'I'll  V.   DECATDB   AltEA 

product  inn,  luit  it  was  not  considered  economical  to  pump  it  alone  al  a 
depth  of  2000  feet.  It  was  tubed  and  iH't  to  stand  after  the  pump  had 
sanded  up  during  an  attempt  to  make  a  pumping  tesl  on  the  beam. 
In  this  condition,  the  fluid  has  been  tinder  sufficienl  pressure  to  till  the 
casing  and  when  the  valve  on  the  casing  head  is  opened,  a  How  of  oil  is 
obtained  For  a  short  time.  This  has  been  used  in  small  quantities  l>. 
local  farmers. 

DETAILED    STRUCTURAL   CONSIDERATIONS    AND   RECOM- 
MENDATIONS FOR  FUTURE  PROSPECTING 

Introduction 

The  structure  contours  on  Plate  I  are  drawn  on  the  top  of  No.  5 
coal  which  is  the  best  representative  horizon  to  correlate  the  records  of 
test  holes  and  mine  shafts  in  the  Decatur  area  with  those  in  northern 
Christian  County.  The  elevations  given  are  based  on  sea  level  datum. 
Values  for  the  altitude  of  No.  5  coal2  in  those  borings  in  Christian  and 
Moultrie  comities  that  have  not  gone  deep  enough  to  penetrate  the 
horizon  of  that  coal  have  been  obtained  from  that  of  Xo.  6  coal  by 
means  of  the  interpolated  interval  from  the  nearest  isochore  line 
(PI.  I). 

As  shown  by  the  structure  contours  on  the  ma]),  the  regional  dip  is 
to  the  southeast.  Any  slight  local  dip  to  the  north  and  west  indicates 
the  presence  of  some  local  folding.  Such  folding  of  the  strata  would  be 
favorable  for  the  accumulation  of  oil  in  petroliferous  beds,  only  if  com- 
plete local  reversal  of  dip  is  present. 

Areas  of  Possible  Local  Doming 

There  are  four  localities  where  such  irregularities  in  the  regional 
dip  appear  to  exist,  and  are  shown  on  Plate  I  by  shading.  One  is 
northwest  of  Decatur — northwest,  north  and  east  of  the  recent  deep 
drilling  in  sec.  32,  T.  17  X.,  E.  2  E.  (Record  Xo.  3,  Macon  County) 
and  sec.  5,  T.  16  N.,  R.  2  E.  (Record  Nos.  5  and  6,  Macon  County). 
Another  is  situated  in  T.  1)5  X.,  R.  1  W.  Two  others  of  minor  im- 
portance are  located  in  T.  13  X..  P.  3  W..  and  T.  12  X.,  R.  3  W. 

In  further  testing  of  these  anticlinal  noses  that  are  shown  up  so 
definitelv  in  the  shallow  Pennsylvania!)  beds,  it  is  advisable  to  determine 


s  For     previous     identification     of     Xo.    5    coal,    see    the    following    references: 
Kay.  Fred  H.t  Coal  resources  of  District   VII  :     111.   Mining    Investigations   Bull. 

11.  p.   fix,   1915. 

Cady,  C  H..  Coal   resources  of  District   IV:    111.  Mining  Investigations   Bull.   26, 

p.   140,   1921. 


OIL  IN   THE  DECATUE   AEEA  13 

the  existence  of  complete  closure    in    the    shallow    horizons    before    the 
deeper  horizons  are  tested. 

THE  DECATUR   AREA 
GENERAL  DESCRIPTION 

Of  the  four  areas  mentioned,  the  one  at  Decatur  is  of  first  im- 
portance, because  good  shows  of  oil  have  already  been  found  in  deep 
tests  to  the  Silurian  ("Niagara")  limestone.  The  absence  of  No.  5  and 
No.  6  coals  in  the  area  probably  indicates  the  existence  of  an  elevated 
region  in  late  Carbondale  time  and  suggests  shore  conditions  at  the  edge 
of  the  basin  in  which  No.  5  coal  was  deposited  to  the  east,  south,  and 
west.  Some  local  folding  causing  this  uplift  in  Pennsylvanian  time  is 
also  indicated  by  correlating  the  recorded  No.  5  coal  south,  southeast  and 
northeast  of  Decatur  with  what  appears  to  be  its  equivalent  horizon  in 
the  borings  northwest  of  Decatur.  An  interval  between  the  red  shales 
overlying  the  horizon  of  No.  6  coal  and  one  of  the  coals  or  its  equivalent 
horizon  traceable  as  black  shale  has  been  used  in  determining  the 
horizon  of  No.  5  coal.  Based  on  these  estimates,  the  contours  show  a 
local  structurally  high  area  from  which  the  bedding  of  the  strata  dip 
northeast,  southeast,  and  southwest.  A  dip  to  the  northwest  that  would 
complete  the  closure  in  all  directions  has  not  been  proved  either  in 
shallow  or  deep  horizons  but  possibly  may  be  present. 

The  four  deep  tests  that  have  been  drilled  in  this  area,  three  by  the 
Lincoln  Oil  and  Gas  Company  and  one  by  the  Atlantic  Oil  and  Gas 
Company,  are  aligned  approximately  in  a  north-south  direction  (PL  I). 
From  examination  of  the  various  formational  contacts  noted  in  the 
logs  in  the  appendix  and  in  the  cross  section  (fig.  1),  it  will  be  seen  that 
in  well  No.  2  of  the  Lincoln  Oil  and  Gas  Company  (  Record  No.  6,  Macon 
County)  which  is  located  slightly  west  of  well  No.  1  (Eecorcl  No.  5, 
Macon  County)  the  top  and  bottom  of  the  Chester  and  the  top'  of  the 
"Niagara"  are  higher  than  in  No.  1,  while  the  top  of  the  Sweetland 
Creek  shale  is  a  very  little  lower.  The  bottom  of  the  Chester  is  markedly 
higher,  but  this  is  probably  accentuated  by  a  local  high  erosional  area  on 
the  surface  of  the  "Mississippian  Lime"  before  the  deposition  of  the 
Chester.  It  is  not,  therefore,  altogether  indicative  of  bedding  structure, 
although  in  Illinois  if  such  erosional  highs  are  of  relatively  large  extent, 
they  may  indicate  some  folding  of  the  Mississippian  beds  prior  to  the 
deposition  of  the  overlying  formations.  These  considerations  suggest 
the  existence  (if  a  high  local  structure  situated  to  the  north  and  west  of 
well  Xo.  3  of  the  Lincoln  Oil  and  Gas  Company. 


14  OIL   IV   THE   DECATUB   ABEA 

On  the  other  hand,  the  following  facts  point  to  the  existence  of  a 
high  structure  north  and  east  of  well  No.  .'!.  The  top  and  bottom  of 
the  Chester  formations  and  of  the  Sweetland  Creek  shale  show  a 
general  southward  dip  of  approximately  LO  feel  to  the  mile.  This  is  a 
little  greater  than  the  average  regional  dip  which  is  at  a  maximum  in  a 
direction  somewhat  east  of  southeast.  Such  a  southward  dip  would  imply 
a  high  local  structure  to  the  north  or  to  the  northeast  of  the  test  in  sec. 
32,  T.  17'  X.,  R.  2  E.  (Record  No.  3,  Macon  County).  Additional  evi- 
dence of  a  possible  structural  high  area  in  this  direction  may  he  found 
in  the  trend  of  the  lobe  shown  by  the,  shallow  contours  and  the  fact  that 
the  top  of  the  "Niagara"  in  Lincoln  No.  3  is  a  little  higher  than  in 
Lincoln  No.  2  and  is  situated  slightly  northeast  of  it. 

RECOMMENDATIONS     FOB    FTJTUBE    DRILLING 

Tests  for  production  therefore  in  this  area  might  he  located  a  mile 
and  a  half  to  the  north  and  slightly  west  of  Lincoln  No.  :'>  well,  or  about 
olii1  mile  to  the  east  of  Lincoln  No.  ">.  llowe\el',  deep  tests  should  not 
he  undertaken  until  closure  to  the  northwest  in  the  shallower  horizons 
has  been  demonstrated.  Further  information  from  the  test  fur  struc- 
tural closure  will  help  to  determine  the  best  location  for  a  production 
test. 

OTHER  POSSIBLE  ABEAS  ()[•'   LOCAL  DOMING 

In  the  light  of  our  present  knowledge,  the  other  local  structures 
mentioned  do  not  present  as  favorable  possibilities  as  the  Decatur 
structure.  Xo  shows  of  oil  have  been  reported  in  association  with  them, 
hut  no  tests  on  them  have  gone  deeper  than  the  IVimsvlvanian  with  the 
exception  of  an  oil  test  by  the  Palmer  Oil  Gas  and  Mineral  Company  in 
sec.  15',  T.  12  X..  R.  3  W.  (Record  No.  30,  Christian  County)  which  is 
situated  on  the  edge  of  at  least  a  structurally  flattened  area.  The  te  I 
stopped  in  the  M  ississippian  "Big  Lime".  As  shown  on  the  map.  an 
area  immediately  to  the  west  of  this  test  might  prove  productive  if  there 
is  structural  closure  farther  to  the  west. 

A  small  area  in  T.  L3  X..  P.  •'!  \V.  show-  a  possibility  of  some  closure 
in  the  Pennsylvanian  strata.  If  this  is  also  shown  in  horizons  at  greater 
depth,  oil  accumulation  might  be  expected,  hut  owing  to  the  small  area 
of  the  structure,  closure  at  depth  appears  doubtful. 

In  the  shaded  area  shown  on  Plate  I  in  T.  1.'!  X..  P.  1  \Y..  there  is 
promise  of  the  -hallow  structure  being  represented  also  at  greater  depth. 
If  closure  can  he  proved  in  shallow  horizons,  a  deep  test  would  he  justi- 
fied and  probably  should  he  located  about  the  center  of  the  shaded  area. 


OIL   IX   THE   DECATUB   ABEA  15 

Tlie  Mount  Auburn  Oil  and  Gas  Company's  test  in  sec.  25,  T.  15  X., 
R.  2  W.  (Boring  No.  19,  Christian  County)  apparently  is  situated  near 
the  axis  of  a  plunging  anticline  but  in  a  position  where  the  plunge  is 
steep.  Along  the  axis  to  the  north  and  particularly  along  the  axis  about 
4  miles  to  the  south  where  the  presence  of  some  flattening'  of  the  axis 
is  indicated,  would  have  been  a  better  position  for  a  decisive  test.  A 
slight  show  of  oil  Avas  reported  10  and  20  feet  below  the  top  of  the 
Silurian  lime. 

Lack  of  data  prevents  more  detailed  knowledge  regarding  the  pos- 
sibility of  a  local  closure  in  the  south  l/o  of  T.  15  X.,  E.  2  E.  and  the 
northwest  corner  of  T.  11  X..  R.  2  E.,  but  there  is  a  suggestion  of  a 
structural  terrace  or  at  least  a  somewhat  flattened  interruption  of  the 
regional  dip.  A  test  (Boring  Xo.  17)  in  sec.  80.  T.  15'' N.,  R.  2  E..  and 
one  (Boring  No.  20)  in  sec.  3,  T.  14  X.,  R.  2  E..  Macon  County,  were 
drilled  almost  to  the  base  of  the  Chester  series.  Salt  water  was  found 
in  the  basal  Pennsylvanian  and  Chester  sandstones.  This  area  would  be 
of  interest  for  further  testing  for  favorable  structural  closure  if  the 
neighboring  more  pronounced  structures  prove  productive. 

COXCLIISIOXS 

Where  structural  irregularities  in  the  shape  of  anticlinal  noses 
suggest  the  possibility  of  some  local  complete  closure,  particularly  as  in- 
dicated by  the  four  shaded  areas  on  Elate  I,  it  is  recommended  that 
tests  with  the  diamond  drill  be  undertaken  to  determine  the  presence 
and  amount  of  total  closure  in  a  suitable  shallow  key  horizon  before 
incurring  the  expense  of  a  deep  hole  to  fie  Silurian  ("Niagara") 
dolomitic  limestone  horizon.  The  coals  of  the  Pennsylvanian  serve  as  a 
fair  index  for  structure  determination,  and  have  shallow  depth  in  their 
favor,  but  although  the  contact  between  the  base  of  the  Chester  series 
and  the  "Big  Lime"  of  the  Mississippian  is  considerably  deeper  and 
locally  unconformable,  it  is  probably  a  more  reliable  index  of  the 
structural  parallelism  of  the  deeper  formations. 

Tests  to  the  surface  of  the  Mississippian  "Big  Lime"  would  provide 
three  key  horizons  for  correlation  purposes — some  coal  or  Limestone  in 
the  Pennsylvanian,  the  top  of  the  Chester  and  the  top  of  the  Missis- 
sippian "Big  Lime."  Although  two  of  these  are  unconformable,  it  is 
believed  that  they  will  indicate  accurately  enough  the  presence  of  any 
structural  closure  sufficient  to  warrant  drilling  to  the  deeper  horizons 
for  production. 


16 


OIL   IN    THE   DECATUR    \l;i   \ 


APPENDIX— E K I'H KSKXTATIV K    LOOS 


CHRISTIAN  COUNTY 


No.  19 


Mt.  Auburn  Oil  and  Gas  Co. — No.  2 

C.  Montgomery  farm 

NW.  Vi,  NW.  %,  sec.  25,  T.  15  N.,  R. 
2  W. 

Curb  elevation— 607.8  feet 

Thickness  Depth 

Feet  Feet 
Pleistocene  system 

Soil,  sand  and  gravel 128  128 

Pennsylvanian  system 

Shale,    white    207  345 

Coal     4  349 

Shale,    white    46  395 

Lime,    white     5  400 

Horizon  of  No.  5  coal 

Slate   (set  10-inch  casing). 100  500 

Lime,  white    15  515 

Shale,  brown    25  540 

Shale,    white    160  620 

Sand      (hole      filled      with 

water)      80  700 

Slate,   black    65  765 

Slate,    black    (set   814-inch 

casing)     35  800 

Mississippian  system 

Upper  Mississippian  sub-system 
Chester  series 

Lime,  dark   15  815 

Lime,   white    5  820 

Slate,   white    10  830 

Sand      (hole     filled      with 

water)     25  855 

Shale,    green    3  858 

Sand      4  862 

Slate,   white    4  866 

Sand     3  869 

Slate,   green    (set   6%-inch 

casing)     3  872 

Lime,    white     7  881 

Sand     16  907 

Slate,   white    8  915 

Pyrites    of    iron 5  920 

Lime,   brown    10  930 

Sand     10  940 

Lime     5  945 

San>l     20  965 

Lower    Mississippian    sub-system 


Lime     385 

Shale,    white    13 

(under-reamed;      set      6%- 
inch  casing) 

Shale,    blue    147 

Lime,    gray     30 


1350 
1363 


1510 
1540 


Lime,    white     (one    bailer 

of  water  per  hour) 5  1545 

Lime,    white     35  1580 

Lime,    white     (one    bailer 

of   water   per   hour)....     5  1585 

Lime,    white     35  1620 

Lime,    gray     10  1630 

Lime,  green    3  1633 

Lime,  gray    27  1660 

Lime,   pink    5  1665 

Lime,  gray    35  1700 

Lime,  green    15  1715 

Slate,    green     5  1720 

Lime,   white    2  1722 

Rock    red    13  1735 

Lime,   brown    20  1755 

Sweetland  Creek  shale 

Shale,    blue     45  1800 

Lime,   brown    10  1810 

Shale,  brown    100  1910 

Silurian  system 

Lime,   brown    116  2026 

From  1910  to  2000  feet,  sand  was 

noticeable  in  lime.  At  1920  to  1930 
more  sand   was    shown    and    also    a 

show  of  oil.  No  trace  of  gas  any 
place  in  hole.  Well  abandoned  at 
2026   feet. 

No.   21 
Byrd-Wittey 

Cen.  E.  line,  8E.  %,  NW.  %,  sec.  2.',, 
T.   I)  N..   R.   1   W. 


Curb   elevation — 607   feet 

Thickness  Depth 

Ft.  in.  Ft.  in. 
Pleistocene  system 

Clay     30  ...        30 

Clay  and  gravel 60  ...       90 

Clay  and  gravel 54  ...  144 

Pennsylvanian  system 

Soft  shale    2  ...  146 

Slate  7  ...  153 

Sandstone    4  ...  157 

Slate     2  ...  159 

Gray   shale 7  ...  166 

Gray  shale    9  . . .  175 

Dark  shale  3  . . .  178 

Fire  clay   6  . . .  184 

Gray   shale    9  .  .  .  193 

Dark  shale    5  . . .  198 

Limestone    6  ...  204 

Gray    shale     1  ...  211 

Dark  shale   5  . . .  216 

Dark  shale    8  . . .  224 

Gray  shale   3  . . .  227 


CHRISTIAN    COUNTY 


17 


No.  21 — Concluded 

Dark  shale   4  . . .  231 

Gray   shale    8   . . .  239 

Dark  shale   11    .  .  .  250 

Gray   shale    14    ...  264 

Dark  shale    8    . . .  272 

Gray   shale    14   .  .  .  286 

Dark  shale    6   . . .  292 

Dark  shale    6    .  .  .  298 

Gray  shale   15   ...  313 

Gray  shale    7    .  . .  320 

Dark  shale    6    .  . .  326 

Gray   shale    11    .  .  .  337 

Dark  shale    2  8  339  8 

Coal     12  340  10 

Gray   shale    12  342 

Gray   shale    G    .  .  .  348 

Sandstone    2   ...  350 

Dark  shale    6    ...  356 

Gray   shale    10    .  . .  3G6 

Dark  shale    32   . . .  392 

Gray  shale    21    . . .  419 

Dark  shale   13   . . .  432 

Dark  tough  shale 23    ...  455 

Gray   shale    11   ...  466 

Gray  shale    8   . .  .  474 

Black  shale 12  475 

Coal     1  10  477 

Blue   shale    2    .  . .  479 

Gray  shale    3  3  482  3 

Coal     16  483  9 

Limestone     5  9  489   . . 

Sandstone    4    ...  493    . . 

Gray   shale    11    ...  504   .. 

Blue   limestone    8    ...  512    . . 

Black  shale 2  4  514  4 

Coal    (No.   6) 2  10  517  2 

Shale  band    3   .  .  .  517  5 

Coal    (No.   6) 3  6  520  11 

Soft    dark    shale 1V>  521   % 

Coal    (No.   6) 1  iy2  522  2 

Sulphur    band    1  522  3 

Ccal    (No.   6) 1  10  524  1 

Fire  clay  4  11  529  . . 

Dark  shale    3    . .  .  532   . . 

Gray  shale   7  . . .  539   . . 

No.  22 

Stonington  Well 

NE.  K,  SE.  %,  sec.  28,  T.  l't  N..  R. 
1   W. 

Curb   elevation — 613   feet 

Thickness  Depth 

Ft.  in.  Ft.  in. 
Pleistocene  system 

Soil     3   ...         3   .. 

Clav,    yellow 4    ...         7    .. 

Clay,    dark 6    .  . .  13    .  . 

Sand,  gray   5    ...        18 


Gravel    3 

Clay    3 

Sand   and   gravel 10 

Gravel    2 

Clay,    yellow    16 

Clay,    yellow    5 

Sand,    fine    5 

Sandy    clay    14 

Clay    and    gravel 6 

Gravel  . . . 
Clay,  blue 
Clay,  blue 
Sand,  fine 
Sand 


...24 
...  1 
...16 

Sand    and    gravel 2 

Pcnnsylvanian   system 

Lime,   soft,   shale 10 

Shale,    blue 7 

Limestone   7 

Limestone   3 

Shale,    blue    21 

Limestone   4 

Shale,   blue   sandy.... lo 

Lime     

Shale,  black 2 

Coal    

Shale,    soft,    green....    5 

Lime,  shale    9 

Shale,    blue    4 

Sbale,    black    4 

Shale,    blue,    sandy...  10 

Sandstone     2 

Shale,  blue,  sandy. ..  .21 
Shale,    blue,    sandy... 27 

Shale,    dark   blue 8 

Shale,  black   

Coal    1 

Shale,    blue    2 

Shale,    blue    3 

Sandstone     7 

Shale,    blue    7 

Shale,    blue    28 

Blue  slate   with  brown 

sulphur    43 

Sand      shale     with      2 

inches   of  coal 1 

Fire    clay    4 

Shale,    black    15 

Limestone     3 

Limestone     3 

Shale,    black 8 

Fire    clay 2 

Shale,    black    5 

Coal    6 

Shale    and    limestone.  14 

Limestone     5 

Shale    or    clod 

Coal    (No.    6) 7 

Fire    clay 3 

Lime    shale    9 

Limestone     1 

Slate,   black 3 


21 

24 

34 

36 

52 

57 

62 

76 

82 

85 

120 

144 

145 

161 

163 

173 

180 

187 

190 

211 

6 

216 

226 

226 

8 

228 

li 

229 

2 

234 

8 

243 

8 

248 

4 

252 

4 

262 

4 

264 

4 

285 

312 

4 

321 

321 

4 

322 

7 

325 

4 

328 

4 

335 

4 

342 

4 

370 

4 

413   4 


414 

7 

418 

7 

434 

4 

437 

10 

441 

4 

449 

10 

451 

10 

452 

3 

452 

9 

466 

9 

472 

4 

472 

11 

480 

4 

483 

10 

493 

4 

494 

10 

497 

10 

18 


OIL    IN    THE    DECATUR   AltEA 


No.  22 — Conducted 


Coal     4  2 

Blue    shale   clay 10 

Fire    clay 2 

Limestone     5    I 

Lime    shale 8  8 

Sand     shale 2    . 

Sandstone     4    . 

Sand  shale,  blue 15    . 

Sand    shale,    blue 8    . 

Sand    shale,    blue 10   . 

Slate     8  1 

Coal    (No.    5) 2  7 

Fire    clay 3  4 

Sand    shale,    blue 6   . 

Shale,    sandy 4    . 

Blue   shale    11  7 


502  .. 
502  10 
504  10 
510  2 
518  10 
520  10 
524  10 
539  10 
547  10 
557  10 
565  11 
568  6 
571  10 
577  10 
581  10 
593  5 


No.  23 

Taylor  and  Byrcl — No.  G 

NW.  cor.  SW.  %,  NW.  %,  sec.  1,   T. 
lit  N.,  R.  2  W. 


Curb   elevation — 567.3   feet 

Thickness 
Ft.  in. 
Pleistocene  system- 
Soil   3 

Clay,  blue  12 

Sand     3 

Gravel,   fine    10 

Gravel    12 

Clay,     blue,     mixed 

gravel    7 

Pennsylvanian  system 
Shale,  gray,  sandstone 

partings     5 

Shale,  soft,  gray,  sand- 
stone partings    5 

Shale,    soft,    gray 7  6 

Coal     1 

Limestone,    broken    ..14    .. 

Slate,    dark    4 

Shale,    soft,    s  ti  c  k  y, 

gray    2 

Limestone     2 

Shale,   dark    3 

Lime  shale   10 

Shale,    soft,    sticky, 

gray    8 

Shale,   gray    L6 

Shale,  sandy    10 

Shale,   gray    49  11 

Coal    1  4 

Shale,  sandy,  gray.... 23  9 

Shale,  sandy    19   .. 

Shale,   gray    39   .. 

Shale,    blue,    brown 
sandstone    20 


Depth 
Ft.  in. 


3 
15 
18 


40 


47 


52    .. 

57    .. 

64  6 

65  6 
81    .. 


87  .. 

89  .. 

92  .. 

102  .. 

110  .. 

126  .. 

136  .. 

185  11 

187  3 

211  .. 

230  .  . 

269  .. 

289  .. 


Limestone     4 

Shale,   dark    7 

Slate,  dark   1 

Shale,  very  soft,  gray.    :; 
Shale,    gray,    red 

streaks 2 

Limestone,  hard    2 

Shale,   yellow    3 

Shale,   dark    6 

Limestone,    hard    ....   9 

Shale,   dark    7  2 

Coal    1  10 

Shale,   gray    2 

Lime    shale    15 

Lime  shale,  gray 7  6 

Limestone,  hard   1 

Slate,    black    1 

Limestone     1 

Slate,   black    4 

Limestone     - 

Coal    (No.  6) 5  2 

Fire    clay    10 

Shale,    gray    18 

Lime    shale    4 

Shale,    gray,    brown 

bands     21   .  . . 

Slate,  black    7  3 

Coal   (No.  5) 2  6 

Fire  clay    3 

Lime   shale    9  6 

Coal    6 

Shale,  dark    1 

Coal    4 

Shale,   dark    6  8 

Coal    4 

Shale,   dark    2  8 

Shale,   gray    15 

Sandstone 2 

Shale,   gray    2 

Shale,  blue    26   ... 

Slate,    dark    5 

Coal    1  7 

Limestone     1  5 

Shale,   dark    5  8 

Coal    2 

Shale,   dark    9  4 

Lime    shale    8 

Shale,    gray    5 

Slate,   black    5  10 

Coal    2 

Shale,   dark    4  2 

Shale,   gray    4 

Sandstone     1 

Shale,   dark    4  8 

Coal    2 

Lime  shale 3  4 

Shale,   dark    13 

Sandstone    1 

Shale,    dark    1    ... 

Lime    shale    4  8 

Coal    1   10 

Lime  .shale    6 


293 

30  1 

301 

304 

306 

308 

311 

317 

326 

333 

2 

336 

338 

353 

360 

6 

361 

6 

362 

6 

363 

6 

363 

L0 

364 

369 

2 

370 

388 

392 

413 

420 

3 

422 

9 

423 

432 

6 

433 

r.'A 

434 

4 

441 

441 

4 

444 

459 

461 

463 

489 

494 

495 

7 

4!' 7 

502 

8 

504 

8 

514 

522 

327 

532 

10 

534 

10 

539 

543 

544 

548 

8 

550 

8 

554 

567 

568 

569 

.-.75 

8 

575 

6 

576 

CHRISTIAN    COUNTY. 


19 


577 
581 
592 
612 
626 

645 
653 
656 
66S 
686 
707 

719 
754 

771 
773 

777 


No.  23 — Concluded 

Shale,   gray    1  . 

Sandstone     4  . 

Shale,   dark    11  . 

Shale,   sandy    20  . 

Shale,   dark    14  . 

Shale,  sandstone  part- 
ing     20  . 

Shale,   dark    7  . 

Sandstone     3  . 

Shale,   dark    12  . 

Shale,   sandy    18  . 

Sandstone    21  . 

Shale,    dark,    brown 

bands    12  . 

Shale,   dark    35  . 

Sandstone,  shale  part- 
ing     17  . 

Lime  shale,  soft 2  . 

Conglomerate     4  . 

Mississipian  system 

Upper  Mississippian  subsystem 
Chester  series 

Lime  shale,  soft 9  ...     786 

Lime  shale 14  .  . .     800 

Limestone,  hard    1  ...     801 

Sandstone,  hard    5  .  . .     806 

Sandstone,  hard,  shale 

parting     29  .  .  .      835 

Lime  shale  2  ...     837 

Limestone     9  ...      846 

Sandstone     8  .  . .      854 

Sandstone,  very  coarse- 
grained     18  ...     873 

Limestone     3  ...      876 


No.   '24 
Byrd-Willey — No.  15 

Cen.  N.   line  NW.    %,   NW.   %,   sec. 
16,  T.  J'i  N..  R.  2  W. 

Curb    elevation — 585.1    feet 

Thickness     Depth 
Ft.  in.     Ft.    in. 


Pleistocene  system 

Soil     4 

Clay,  yellow   8 

Clay,  blue  6 

Clay,  blue,  fine  gravel  7 

Sand   5 

Gravel    5 

Clay,       yellow,       fine 

gravel     63 

Gravel    2 

Clay,    blue    5 

Pennsylvanian   system 

Shale,   dark    7 

Limestone     1 


4 
12 
18 
25 
30 
35 

98 
100 
105 

112 
113 


9 
2 

8 

11 

6 


Shale,    gray    11 

Shale,  soft,  gray....  6 
Limestone,  very  hard  6 

Slate,    dark    4 

Shale,  very  soft,  gray  4 
Shale,    soft,   gray....    3 

Limestone     5 

Shale,    gray    16 

Lime  shale  with  hard 

bands    9 

Lime    shale    4 

Shale,     gray,     brown 

bands   23 

Shale,    tough,    dark.  .29 

Shale,   gray    6 

Coal    1 

Shale,  very  soft,  gray  3 

Shale,  sandy 16 

Shale,  sandy,  gray... 40 
Shale,  tough,  gray...  10 

Shale,  sandy 9 

Shale,    tough,    dark.. 24 

Shale,   gray    16 

Shale,      very     soft, 

gray,  and   red 7 

Shale,    blue    6 

Limestone     4 

Shale,   gray    6 

Coal    (No.    7) 4 

Fire   clay    

Shale,        very        soft, 

gray    4 

Limestone,    hard    ...    1 

Shale,   dark    4 

Shale,    gray    11 

Shale,    dark    5 

Slate,    black     2 

Coal    (No.    6) 5 

Shale,    gray    1 

Sandstone     4 

Limestone     7 

Shale,    blue    32 

Slate,  black    7 

Coal    (No.    5) 3 

Shale,    gray    1 

No.   25 
Byrcl-Willey—No.  1G 


SW.  cor..  SW.  %,  NW.  14,  sec.  20,  T. 
l.'i  N.,  R.  2  W. 

Curb  elevation — 585.8  feet 

Thickness  Depth 

Ft.  in.  Ft.  in. 
Pleistocene  system 

Soil     2    ...  2    . . 

Clay    16   .  . .  18  . . 

Cement  and  gravel...   2   ...  20   . . 

Clay,  blue  gravelly. .  .59   ...  79   . . 


8 

7y2 

8% 


124 

130 

136 

140 

144 

147 

152 

168 

177 

181 

204 

233 

239 

240 

5 

244 

260 

300 

310 

319 

343 

359 

366 

372 

9 

376 

11 

383 

7 

388 

6 

389 

393 

394 

398 

409 

414 

416 

8 

422 

3  V 

424 

428 

435 

467 

475 

7 

478 

9 

480 

20 


(ill.    IN    THE   DECATUR   AREA 


No.  25 — Concluded 

Sand     4  6 

Pennsylvanian  system    (Shoal 

and     Carlinville     limestone 

114-175  feet) 

Shale,  blue   6 

Shale,  soft  blue 30 

Shale,  soft  gray,  lime.    6 

Limestone     3 

Shale,    soft    lime 4 

Limestone     2 

Lime  shale   3 

Limestone   7 

Shale,   dark    9 

Lime    shale    10  4 

Limestone     5  8 

Clay  shale,   soft 5 

Lime  shale  pebbles...    6    .. 

Sandstone   10 

Shale,   sandy    43 

Shale,  tough  blue,  with 

brown  bands    15    .. 

Shale,    dark    3  7 

Coal,   bony    3 

Coal    1  2 

Clay  shale 3 

Limestone     1  6 

Shale,  sandy    40  6 

Shale,    tough   blue. ...   6 
Shale,     tough     blue, 

brown  bands    41 

Lime  shale   7 

Shale,    soft    gray    and 

red    8 

Shale,  sandy    12   .. 

Limestone     3  6 

Shale,  black 2 

Shale,   dark    5  9 

Coal    1  9 

Coal,  bony    5 

Coal    1 

Shale,  blue   4  2 

Limestone     4  11 

Shale,  gray 0 

Limestone     1 

Lime  shale  3  4 

Limestone     5  7 

Shale,  black 1 

Coal    (No.  6) 3  5 

Shale    1 

Coal    9 

Fire  clay 9 

Clay   shale    1 

Limestone   4 

Lime      shale,      lime 

bands   12 

Shale,    blue,    b  r  o  w  n 

bands    2 

Shale,  tough,  blue 5 

Limestone     7 

Shale,    black    2  9 


83 

6 

Cn 

efc 

from, 

84 

114 

120 

123 

127 

129 

132 

139 

148 

158 

4 

1G4 

109 

175 

185 

228 

243 

246 

7 

246 

10 

248 

251 

252 

6 

293 

299 

340 

347 

355 

367 

370 

6 

372 

378 

3 

380 

380 

5 

381 

5 

385 

7 

390 

6 

391 

392 

395 

4 

400 

11 

401 

404 

5 

404 

6 

405 

3 

406 

407 

411 

Coal,  bony    3  429 

Coal    4  9  433  9 

Fire  clay 3  434   . . 

Shale,  blue   1   .  •  •  435   . . 

\'o.  2"i 

Byrd-~\Yille>j—Xo.   Hi 

NW.    i,,  SE.    ',.  NE.   Vi,  sec.  1.1.   T. 
13  X..  H.  J   W. 

Curb    elevation — 573    feet 

Thickness  Depth 

Ft.  in.  Ft.  in. 
Pleistocene  system 

Clay    11    ...       11   .. 

Sand    22    ...       33    .. 

Clay  and   loose   rock . . 32    . . .       65    . . 
/ V a  n s id va n ia n   s i/stcm 

Shale,    black     16  66  6 

Coal     6  67 

Shale,    light    15    ...       88 

Shale,    sandy    23    .  .  .  105 

Sandstone     4   .  .  .  109 

Sand   shale    1   ...  116 

Sandstone    31   . . .  147 

Shale,    dark    blue 6   .. .  153 

Shale,   soft    8   . . .  161 

Shale,  blue  with  a  few 

limestone   bands    ...]0    ...  171 

Limestone     11    ...  182 

Shale,  black    3    . . .  185 

Shale,  blue    8   .  . .  193 

Shale,    dark    1   ...  200 

Shale,    soft,    light 4   .  .  .  204 

Shale,  light  with  lime- 
stone   nodules    6    ...  210 

Shale,  light  sandy 6    ...  216 

Shale,    tough    blue 5   ..  .  221 

Shale,    blue     4  6  225  6 

Limestone     1   ...  226  6 

Shale,    black    13  227  9 

Coal,    bony    6  228  3 

Shale,   soft    8   . .  .  236  3 

Sandstone,  soft    2  6  238  9 

Shale     and     sandstone 

mixed     7 

Shale,  blue    58  3 

Shale,    black     16 

Coal,    bonv    6 


423    .. 

425   .. 

425  5 

426  .. 

428  9 


Shale,    sandy    4 

Shale,    soft    1 

Shale,    sandy    58 

Shale,    tough    blue 12 

Shale,    blue     14  10 

Coal,    bony    2 

Shale,    soft    3  6 

Limestone     6 

Shale,    soft    light    with 

limestone    nodules    .    2    . .  . 
Shale,    hard    6 


245  9 

304  .  . 

305  6 

306  .. 

310  .  . 

311  .  . 
369  .. 
381  .  . 

395  10 

396  .  . 

399  6 

400  .. 

402  .. 
408  .. 


CHRISTIAN"    COUNTY 


21 


Xo.  27 — Concluded 

Shale,    soft    light 3  6  411  6 

Shale,    black     2    ...  413  6 

Shale,  variegated    ....    8    ...  421  6 

Limestone    and    shale.   2  6  424   .  . 

Shale,    light    4   ...  428   . . 

Shale,   variegated    8  2  436  2 

Shale,    dark    10  437 

Shale,    soft    light 1    .  .  .  438    . . 

Shale,    dark    2  438  2 

Coal     3  5  441  7 

Shale,  soft  light 4  11  446  6 

Shale,    dark    6  447    . . 

Coal     6  447  6 

Shale,    light    3  6  451   . . 

Lime  shale    14   ...  465   .. 

Limestone     2  6  467  6 

Limestone,     dark     fos- 

siliferous     2  11  470  5 

Shale,    dark    2  470  7 

Coal     (No.    6) 7  9  478  4 

Shale,    soft    light 9  2  487  6 

Shale,  black    2   ...  489  6 

Coal     4  6  494   . . 

Shale,    light    1   .  .  .  495   . . 


Xo.  28 
Byrd-Willey— No.  13 

NW.   %,  NW.   %,  SE.  %,  sec.  13.   T. 
13  N.,  R.  2  W. 

Curb  elevation — 601  feet 

Thickness  Depth 
Ft.  in.      Ft.  in. 
Pleistocene  system 

Clay    14   ...       14   . 

Sand   8   ...       22   . 

Clay  and  rocks 11   ...       33   . 

Sand,   coarse    7   .  . .       40    . 

Sand,  fine   4    ...       44   . 

Clay   and   sand 37   ...       81   . 

Sand   23   ...  104   . 

Clay    17   ...  121   . 

Sand   8   ...  129    . 

Clay    7   ...  136   . 

Sand    11   ...  147    . 

Gravel    2   ...  149   . 

Clay,  sandy   2  .  . .  151   . 

Loose  boulders    16  152  6 

Pennsylvanian  system- 

Sandstone     9  6  162    . . 

Shale,    blue    3   . . .  165    .  . 

Shale,  soft  light 19    ...  184   . . 

Limestone   (C  a  r  1  i  n- 

ville)     9  6  193  6 

Shale,   light    1    .  .  .  194  6 

Shale,    black    2  6  197    . . 

Shale,    blue     15    .  . .  212    .  . 


Shale,  soft  with  hard 

lumps     7    .  .  .  219    .. . 

Limestone    and    shale 

mixed     6   .  . .  225    .. . 

Shale,   light    3  6  228  6 

Limestone     4    .  .  .  232  6 

Shale,    black    16  234    .. . 

Shale,   soft,   light 6    ...  240   .. . 

Lime    shale    3  6  243  6 

Shale,   light    9  2  252  8 

Coal    10  253  6 

Shale,   light    16  255    .. . 

Shale,   sandy    9    . .  .  264    .. . 

Sandstone     9    .  .  .  273    ..  . 

Shale,  sandy    9   .  . .  282   .. . 

Shale,    blue     39  2  321  2 

Coal    13  322  5 

Shale,  soft    17  324    .. . 

Shale,  blue    i   ...  328    .. . 

Shale,   sandy    4    .  .  .  332    ..  . 

Sandstone,    soft   with 

a  few  shale  streaks.  40   ...  372   ... 

Shale,  blue   18   . . .  390   .. . 

Shale,  tough,  blue... 29    ...  419    .. . 

Coal    3  419  3 

Shale,   soft    4  9  424    .. . 

Shale,  tough,  blue...    5   ...  429    .. . 

Shale,   soft    4    .  . .  433    ..  . 

Shale,   dark    2   .  .  .  435   ..  . 

Limestone,   blue 6  435  6 

Shale,      soft,      varie- 
gated     10  6  446   .  .. 

Shale,    dark   blue 2  7  448  7 

Coal    (No.   7) 7  449  2 

Shale,    dark    10  450    .  .  . 

Lime    shale    3    ...  453   . .  . 

Limestone     4    ...  457    .  .  ■ 

Limestone   and    shale  2   .  ■  ■  459    .  .  . 

Sandstone    6  6  465  6 

Limestone     16  467    .  . . 

Shale,  black   6  2  473  2 

Coal     (No.    6) 5  4  478  6 

Sulphur   band    %  478  6y2 

Coal   (No.  6) 6  479   % 

Blue   band    1%  479  1% 

Coal    (No.  6) 17  480  8% 

Sulphur   band    %  480  9 

Coal    (No.  6) 4  481  1 

Shale,   light    7  11  489    ..  . 

Shale,  soft    4   . .  .  493   .  .  . 

Limestone      mixed 

with  shale    7   . . .  500   .. . 

Shale,    soft     4    .  .  .  504    .  . 

Shale,   light    5   . .  .  509    ..  . 

Shale        with        sand 

streaks     5   ...  514   . . . 

Shale,    gray    6   .  .  .  520   .. . 

Shale,    blue    34    .  . .  554    ..  . 

Blue  rock,  hard 1   ...  555   ... 

Shale,    black    6  6  561  6 

Limestone,   blue 11  562  5 

Shale,    black    2  562  7 


22 


OIL    l.\    THE    DEOATUR   AliKA 


\n.    28      -Concluded 


Coal    (No.  5) 2  4 

Shale,  soft    4  1 

Shale   w  i  t  h    sand 

streaks     0 

Shale,   gray    17 

Shale,    black    4 

Coal     1 

Shale,    blue    G 

Sandstone     5 

Shale,    blue    26  G 

Shale,    soft     7 

Shale,   dark    1 

Coal    1 

Shale   parting    

Coal    1 

Shale,    soft    1 

Sandstone     7 

Shale,   sandy    .... 

Shale,  blue   8 

Shale,    black    3 

Coal    1 

Shale,  light  sandy...    1 

Shale,  light    6 

Shale,    sandy    4 

Sandstone     4 

Shale,  blue  1 

Coal,  bony    

Shale,   soft    3 

Shale,   light    2 

Shale,   dark    2 

Coal    

Shale,    dark    1 

Shale,   soft    5 

Limestone     2 

Coal    

Shale,  blue    15 

Shale,    black    2 

Shale,    gray 4 

Shale,    blue    2 

Shale,   dark  blue. ...  9 

Coal    (No.   2) 2 

Sandstone,  soft   17 

Shale,   light    3 

Shale,    dark    2 

Shale,      blue      with 

sandstone    streaks.  3f> 

Sandstone     34 

Sandstone  and    shale 

mixed     15 

Shale,  blue  with  sand 

streaks     19 

Sandstone    and    shale 

mixed    23 

Sandstone   4 

Shale,   dark   blue 27 

Mississippian  system 

Upper  Mississippian  sub- 
Chester  series 
Limestone     31 


3 
3 
2 
10 

8  6 


564 

11 

569 

575 

592 

596 

597 

597 

6 

602 

6 

629 

636 

637 

638 

3 

638 

6 

639 

8 

641 

6 

648 

6 

657 

665 

668 

8 

669 

10 

671 

677 

681 

685 

6 

686 

6 

686 

10 

690 

692 

694 

5 

694 

10 

696 

701 

703 

9 

704 

4 

719 

6 

721 

6 

726 

728 

737 

3 

739 

7 

757 

700 

762 

798 

832 

847 

866 

889 

893 

919 

system 

, 

950 

Xo.  29 

Well   near   Clarksdale 
con      /VW     «S^~ 

%,  sec.  IS,  T.   12  N.,  R.  S  W. 


Depth 

Ft.  in. 

19  . 

66  . 

78  . 

89  . 

91  . 

92  . 

94  . 

108  . 

122  . 

124  . 

129  . 

140  . 

141  . 

142  . 
146  . 
158  . 
160  . 

164  . 

177  . 

178  . 

190  . 

217  . 

245  . 

268  . 

306  . 

330  . 

347  . 

366  . 

380  . 

386  . 


Curb  elevation--620+   feet 

Thickness 
Ft.  in. 
Pleistocene  syst*  m 

Clay,    yellow    19 

Clay     29 

Clay,    yellow    12 

Clay,    blue    11 

Gravel    and    clay 2 

Gravel    and    clay 1 

Pennsylvanian  system 

Clay   shale    2 

Shale,    blue    14 

Shale,    blue    14 

Limestone     2 

Shale,  blue    5 

Limestone     11 

Shale,    gray    1 

Shale,  blue  1 

Shale,    gray    4 

Shale,  blue   12 

Shale,  blue   2 

Shale    with    limestone 

bands    4 

Shale,   sandy    13 

Shale,  black    1 

Shale    with    limestone 

bands    12 

Sandy  shale   27 

Sandstone     28 

Sandstone     23 

Sandstone     38 

Shale,   sandy    24   . 

Shale,   sandy    17    . 

Shale,   sandy    19    . 

Shale,  blue   14    . 

Shale,  blue   6    . 

Shale,    dark   blue 2    . 

Shale,   sandy    11    . 

Shale,   sandy    18    . 

Shale,   sandy    It:    . 

Shale,  blue    3    . 

Shale,  blue   1  8 

Conglomerate     9 

Shale,    dark    blue 7    . 

Shale,  blue    2    . 

Shale,    dark    blue 7 

Shale,    dark   blue 2   . 

Limestone,  shale  part- 
ings         1 

Shale,   sandy    13    . 

Shale,    light   blue 2   . 

Shale,   light    blue 11    . 

Shale,    light   blue 5  7 

Coal  (No.  5) 2  4 


399 

417 

4:13 

436 

437 

8 

438 

5 

445 

5 

447 

5 

448 

450 

451 

? 

464 

466 

477 

481 

7 

483 

11 

CHRISTIAN    COUNTY 


23 


No.  29 — Continued 


Shale,   light   blue 6 

Shale   with   streaks   of 

limestone     

Shale,    black    2 

Shale,  blue    15 

Shale,  blue   1 

Shale,    sandy    2 

Shale    with    limestone 

bands    4 

Shale,  blue   16 

Shale,   sandy    2 

Shale,   sandy    3 

Shale,  black   7 

Shale,    black    7 

Shale,  blue   2 

Shale,   sandy    1 

Shale    8 

Shale,        dark        blue, 

sandy    13 

Sandstone    3 

Shale,  dark  blue 

Shale,   sandy    17 

Shale,  blue   9 

Shale,    dark   blue 5 

Coal    1 

Coal    

Limestone     

Shale,  blue 

Sandstone     1 

Shale,   blue,  sandstone 

bands    3 

Shale,  blue,   sandstone 

bands     2 

Coal    

Coal    1 

Shale,   soft    2 

Sandstone    10 

Shale,   sandy    3 

Shale,   sandy    6 

Shale,   blue   with   lime 

bands    3 

Shale,    dark   blue 1 

Coal    

Coal    

Fire   clay    1 

Sandstone     6 

Sandstone,  shale  part- 
ings        2 

Sandstone    5 

Shale,  sandy    4 

Shale,  blue  with  bands  7 

Shale,  blue   8 

Slate,    dark   blue,    coal 

partings     1 

Same    

Shale,  blue    2 

Shale,  soft    1 

Sandstone   

Shale,  blue,  soft 1 


490    .  . 


10 


497 

? 

499 

514 

515 

517 

521 

537 

539 

542 

549 

555 

1 

557 

558 

567 

580 

583 

6 

584 

601 

610 

615 

616 

6 

617 

2 

617 

10 

618 

4 

619  10 
623    .  . 

625  7 

626  .  . 

627  ?2 
629  6 
639  6 
643    .. 
649    .. 


652  .  . 

653  10 

654  4 

655  2 

656  6 
663    .. 

665  .  . 

670  .. 

674  .. 

681  .. 

689  .  . 

690  .. 
690  6 

693  .  . 

694  .. 
694  8 
696  6 


Band  coal    6 

Coal    1   9 

Shale,    blue    9 

Sandstone     4 

Shale    with    sandstone 

partings     5  6 

Sandstone    1  6 

Shale,  blue,   sandstone 

partings     7  8 

Coal  and  shale  mixed    .  .    7 

Coal    3 

Coal    2  9 

Shale,  light    blue 5  3 

Shale,  sandy,  sandstone 

bands    18 

Sbale,  sandy,  sandstone 

bands    13 

Shale    with    sandstone 

bands     6  6 

Sandstone,  soft    2  1 

Coal     5 

Coal    9 

Sandstone     1 

Sandstone,  shale,  sand- 
stone bands    7  3 

Sandstone,   shale  part- 
ings         6 

Sandstone,  shale  part- 
ings         4 

Shale,    sandstone  part- 
ings        7 

Shale,  dark   blue    9 

Shale,  blue    13  6 

Sandstone    6 

Shale,  blue    4 

Shale    with    sandstone 

partings     3 

Shale,    blue    4 

Sandstone     1 

Shale,  blue    1 


697  .. 

698  9 

699  6 
703  6 

709  .. 

710  6 

718  2 

718  9 

719  .. 
721  9 

727    .. 


Miss iss ipp  ia n  sys tc  m 

Upper  Mississippian  sub 

Chester  scries 

Shale,  limestone  bands  3 

Limestone 

T  imestone  1 

Shale,  limestone  bands  6 

Shale,  limestone  bands  9 

Shale,  soft   2 

Limestone,  shale  part- 
ings       1 

Limestone     2 

Shale,  soft  lime 4 

Shale    2 

Limestone     2 

Limestone,  shale  part- 
ings       1 

Lime    shale    2 

Limestone,  shale  part- 
ings    1 

Shale  with  bands 3 


745  .  . 
758  .  . 

764  6 

766  7 

767  .. 

767  9 

768  9 

776 

782 

786 

793 
802 
815  6 
816 

.   820 

.  823 

.  827 

.  828 

.  829 

system, 


4 

832 

8 

833 

834 

840 

849 

851 

852 

854 

858 

2 

858 

860 

4 

861 

6 

864 

865 


24 


Oil    IX    THE    DECATUE    ABEA 


N"o.  29— Concluded 

Limestone     2   ...  870   . . 

Limestone,   shale 

streaks     4    ...  874    .  . 

Limestone     1  6  875  6 

Shale,      limestone 

bands     6  876   . . 

Limestone     10  870  10 

Shale,   limestone  hands  1  2  878 

Limestone     25   .  .  .  903 

Limestone,   shale  part- 
ings         8    ...  911 

Lime  shale   5   ...  916 

Lime      shale,      clay 

partings     4    ...  920 

Sandstone     21    .  . .  941 

Shale    4  6  945  6 

Shale,  blue  14   . . .  965   . 

No.   30 

Palmer    Oil    Gas    and    Mining    Co. — 
No.   1 

NE.   !,,  8E.   U,  sec.  15,  T.  12  N.,  R. 
3   W. 

Curb  elevation — 625  feet 

Thickness  Depth 

Feet  Feet 
Pleistocene   system 

Drift,    dirt    28  28 

Hardpan,     mixed     with 

gravel     52  80 

Pcnnsylvanian  system 

Shale,    white    10  90 

Bastard  lime    7  97 


Slate,  white    53 

Coal,  12  to  18  in 2 

Slate,   white    68 

Shale,    black     10 

Slate,    white     20 

Shale,   pink    10 

Slate,    white     110 

Slate,   black    15 

Slate,     white     (Horizon 

of        No.        5        coal, 

460±)     135 

Shale,  black    20 

Shale,    white    80 

Shale,    black    20 

Slate,    white    190 

Sand,     white,     1st     salt 

water    30 

Mississippian  system 

Upper  Mississippian   suo- 
Chester  series 

Slate,  pink    35 

Sand,   2d   salt  water.  .  .    10 

Slate,   white    40 

Shale,    pink    25 

Sand,  3rd  salt  water..  10 
Slate,  light  brown....  40 
Sand,     light,     4th     salt 

water      15 

Slate,    white     5 

Limestone     15 

Sand  and  salt  water . .  5 
Last     mud     above     Big 

Lime     10 

Slate  cap  Mississippian 

lime     5 

Lower  Mississippian  sub 
In    Mississippian    lime.   15 


MACON  COUNTY 


No.   1 

T.   C.  Grady  farm 

NW.    Vi,   SW.    H,    sec.    2. 

T. 

18   N.. 

R.   2  E. 

Curb  elevation — 714  feet 

Thickness  Depth 

Ft. 

in. 

Ft.  in. 

Pleistocene  system 

Clay     62 

62    .  . 

Gravel,  hardpan   ....     6 

68    .. 

Clay    16 

84   .. 

Hardpan     129 

213    .. 

Hardpan,    sandy    ....     6 

219   .  . 

Clay,   bardpan    54 

273    .. 

Pennsylvaniam  system 

Limestone     15 

288    .. 

Shale,    light     1 

289    .. 

Shale,  black   2 

291    .. 

Shale,   gray    5 

296    .. 

Limestone     4 

300    .  . 

Shale,    light     12 

312    .  . 

Sand   shale    30   . 

Shale,    gray    28    . 

Limestone     10    . 

Shale,    gray    19    . 

Shale,    sandy    90    . 

Slate,    dark     10    . 

Coal     6 

Fire    clay    16 

Sandstone,   gray    ....  3   . 

Shale,    light    8    . 

Limestone     9    . 

Shale,    blue     4   . 

Limestone     7    . 

Sand,    shale    34    . 

Slate,    black    3  6 

Coal     (No.    5) 16 

Slate,  dark    4 

Limestone     17 

Sand,    shale    20 

Slate,   black    4 

Shale,    light    6 

Limestone     4 


150 
152 
250 
260 
280 
290 
4(i0 
415 


550 
570 
650 
670 
860 

890 

system 

925 

935 

975 

1000 

1010 

1050 

1065 

1070 
1085 
1090 

?     1100   ? 

?  1115  ? 
system 
?  1230  ? 


342 
370 
380 
399 
489 
499 
499 
501 
504 
512 
521 
525 
532 
566 
569 
571 
575 
592 
612 
616 
622 
626 


*? 


MACON    COUNTY  25 

No.  3 

Lincoln  Oil  and  Gas  Co. — No.  3 

Parish  farm,  Xo.  1 

SW.  %,  8E.  %,  8E.  %,  sec.  82,  T.  11  N..  R.  2  E. 

Curb  elevation — 644  feet 

Driller's  log 

Thickness  Depth 

Feet  Feet 
Pennsylvanian  system 

Limestone,  argillaceous,  light  gray 10  200 

Same    5  205 

Missing    10  215 

Same    5  220 

Shale,  sandy  gray,  and  coal 30  250 

Shale,  sandy,  brown 10  2(50 

Shale,  laminated,   sandy,  light  and  medium   gray  banding — some 

carbonaceous  partings  5  265 

Shale,    gray,   slightly   sandy 5  270 

Shale,  gray  to  brown,  slightly  sandy 5  275 

Same     5  280 

Shale,  black,  carbonaceous,  slightly  sandy 20  300 

Missing    40  340 

Limestone,  hard  crystalline,   white   to   light  gray 5  345 

Limestone,  hard  crystalline,  white  and  gray 5  350 

Shale,  brown,  with  some  thin  beds  of  black  carbonaceous  shale. . .     5  355 

Shale,  pink   5  360 

Shale,  variegated  light  colored  with  some  limestone,  possibly  con- 
cretions        10  370 

Shale,  gray,  with  thin  interbedded  limestone 10  380 

Shale,  brown,  shading  from  reddish  to  gray 10  390 

Shale,  gray,  medium  dark 10  400 

Missing    25  425 

Limestone,    brown    to    gray    with    carbonaceous    and    argillaceous 

partings     5  430 

Shale,  gray,  with  thin  bedded  limestone 10  440 

Shale,  gray  to  brown,  with  occasional  lime  pellets,  probably  con- 
cretionary        20  460 

Shale,  red  cavy 15  475 

Slate,  blue    50  525 

Slate,   white    75  600 

Slate,  blue    25  625 

Slate,   white    5  630 

Sand,    salt   water 30  660 

Coal     8  668 

Slate,  white    12  680 

Red  rock   40  720 

Slate,   blue    30  750 

Slate,  white   50  800 

Shale,  red    25  825 

Coal     5  830 

Slate,   white    20  850 

Shale,  black    25  875 

Mississippian  system, 

Upper  Mississippian  sub-system 
Chester  series 

White  lime 25  900 

Slate,  blue,  814-inch  set  925  feet,  cave 25  925 

Shale,  black,  underreamed  814-inch   1005  feet 25  950 


".Jli  OIL   IN   T 1 1 1;   DECATUU    .\i;i-..\ 

\n.  :; — Concluded 

Slate,   white    25  975 

Lime,   blue 5  980 

Slate,   blue    ] 20  1000 

Lime,  sandy,  with  water 20  1(120 

Slate,   blue    10  1030 

Shale,  red,  cave,  6%-inch  set  1050  feet 10  1040 

Lime,  sandy,  underream,  6%-inch,  1100  feet 20  L060 

Lime,   white   20  1080 

Slate,  blue,  caves 20  11 00 

Lime,  with  show  oil 5  1105 

Slate,  blue    10  1115 

Sand,   water    10  112.", 

Lower  Mississippian  sub-system. 

Lime,  broken    20  1145 

Lime,  with  water  in  1300 230  1375 

Slate,   white    25  1400 

Lime 50  1450 

Slate,  blue  50  1500 

Lime,   blue    25  L525 

Lime,  white 75  L600 

Slate,  blue  25  1 625 

Lime,  white,  hard,  carried  water 125  1750 

Lime,  white,  bottom  of  lime  formation 20  1770 

Shale,  blue    5  1 775 

Lime,   blue    20  1795 

Shale,  red    5  1 800 

Shale,  white   5  1805 

Lime,   blue   5  3/16-inch,   set   1820 15  1820 

Lime,  broken    10  1830 

Sweetland  Creek  shale 

Shale,    broken    10  1840 

Shale,  black    60  1900 

Shale,  black   50  1950 

Lime,  gray    5  1955 

Shale,  black    40  1995 

saurian  system 

Lime    and    flint 10  2005 

Cavity  with  white  mud 5  2010 

Lime  and  flint 16  2026 

Lime,  softer,  light  buff  sandy 10  2036 

Lime  and  flint 4  2040 

No.   3 

Lincoln  Oil  and  Gas  Co. — No.  S 

Parish  farm,  No.  1 

SW.  V(,  SE.  i',,  8E.  %,  sec.  32,  T.  17  N.,  A\  2  E. 

Curb  elevation — 644  feet 

Log  based  on  study  of  samples 

Thickness  Depth 

Feet  Fet  t 
Samples  begin  at  190  feet 

Limestone,  argillaceous,  light-gray,  sandy;  siltstone,  light-gray, 
sandy;  shale,  green-gray,  laminated,  micaceous,  sandy;  every- 
thing  pyritic    .".  10  200 

Pennsylvanian  system 

Same,    limestone   most   abundant;    some   carbonaceous    soft,    black 

shale,  and  carbonaceous  bits  all  through  sample 5  205 


MACON    COUNTY  27 

Xo.   3 — Continued 

Missing    10         215 

Same,  with  some  chalky  white  chert 5        220 

Siltstone,    gray,    micaceous    (muscovite)    pyritic,    calcareous,    glau- 
conitic,    sandy,    carbonaceous;     coal,    glossy,    iridescent,    dense, 

laminated,  50  per  cent  of  sample 30         250 

Siltstone  as  in  preceding,  dark  gray,  with  faint  chocolate  cast  and 
limonitic  spots,  laminated  with  some  laminae  gray  and  others 

carbonaceous    10         2G0 

Same,  less  brownish 10         270 

Same,  very  fine  grained,  distinctly  light  brown 10         280 

Shale,  black,  fissile,  filled  with  powdery,  pyritic  seams  and  im- 
pregnated with  pyrite  and  mica 20        300 

Missing    40         340 

Limestone,  light  gray,  finely  crystalline  with  laminae  of  siltstone, 

dark  calcareous;  some  soft  white  chert 5         345 

Same,  darker 5         350 

Shale,  mottled,  light-  and  dark-gray,  soft,  poorly  laminated,  non- 
calcareous;    some    thin    layers    of   harder,    black,    carbonaceous 

shale   5         355 

Shale,   highly  calcareous,  variegated   red,   purple  and   green-gray, 

the  last  being  harder  than  the  rest 5         360 

Same,  less  red  and  purple,  more  gray  with  brown,  so  sample  looks 

lighter  colored;   contains  bits  of  white,  calcareous  segregations.    10         370 
Same,  dark  green  to  light  greenish-gray,  with  pyritic  segregations 

along  old  plant  remnants 10         380 

Same,  dark  purplish-brown,  with  an  abundance  of  small  pyritized 

fossils,  some  of  which  show  impressions 10         390 

Same,  darker,  less  purple 10         400 

Missing    25         425 

Limestone,  light  drab,  medium  crystalline,  good  fossils  of  small 
brachiopods;     shale,    non-calcareous,    dark    green    or    brownish, 

poorly  laminated  ;  remnants  of  plant  fragments 5        430 

Shale,  greenish-gray,  while  larger  fragments  are  rich  chocolate  or 

purplish;    non-calcareous    10         440 

Shale,  dark,  in  fragments,  light-greenish  gray  in  cuttings;    hard, 

non-laminated   when   fresh,   non-calcareous 20         460 

Same  14         475 

Horizon  of  No.  5  coal 
Shale,  black,   carbonaceous,   poorly   fissile;    rounded   fragments    of 

chert  and  limestone  that  may  be  surficial 5         480 

Siltstone,  greenish-gray,  abundant  pyrite  in  small  crystals;   some 

shale,  greenish  or  black,  probably  from  above 20         500 

Shale,   bluish-black,   cai'bonaceous,    soft 20         520 

Shale,  light  greenish-gray;    limestone,  dark  gray,   crystalline 20         540 

Shale,  black,  carbonaceous,  fissile,  combustible 10         550 

Missing    1110       1660 

Loiver  Mississippian  system 

Limestone,  blue-gray,  finely  crystalline,  granular  with  fragments 
of  fine-grained,  bluish  fissile  siltstone  and  a  little  chalky  chert. .     5       1665 

Missing    1665       1960 

Swcctland  Creek  shale 
Siltstone,  fine  grained,  or  silty  shale,  non-calcareous,  fissile,  fragile, 
dark-blue  or  brown-black,  with  sand  grains  of  medium  size  and 

angular  contour,  and  with  large  rosin-like  spores 2       1962 

Shale,  dark  chocolate-brown  or  light-green,  hard,  fissile,  spores 
abundant,  especially  in  brown;  fragments  of  a  crystalline  rock, 
either  black  and  white  quartzite  or  pyroxenite,  probably  foreign, 

as  are  other  fragments  of  quartz,  etc.,  in  sample 8       1970 

Same,  all  black,  with  foreign  material 10       1980 

Same,   some   rusty   brown 5       1985 


28  OIL   IN   TIIK   DECATUB   AREA 

No.  3 — Concluded 

Same,  with  much  foreign  material  ground  up  and  looks  like  sand- 
stone; the  shale  is  mainly  dark,  almost  black,  dense,  non-fissile, 
but  brittle,  breaking  into  angular  fragments;  sandstone,  fine 
grained,  gray,  heavily  pyritic;  limestone,  bluish  gray,  very 
cherty,  the  chert  dense,  bluish  white  or  blue;  large  iron  flakes; 

some  purple   shale 10       1995 

Silurian  system. 

Shale,  00  per  cent,  dark  green,  brittle,  dense,  non-laminated;  10 
per  cent  limestone,  blue-gray,  pyritic,  sandy;    30  per  cent  blue 

or  blue-white  dense  chert 5       2000 

Limestone,  light  bluish  gray,  sandy,  finely  crystalline,  rusty  from 
drill    cuttings    and    with    much    dense    bluish-white    chert,    and 

shale  from  above;   the  sand  grains  are  large,  sub-angular 2       2004 

Same,    less    rusty 2       2004 

Siltstone,  light  gray  greenish  tinge,  fine  grained,  sandy  calcareous  1  2005 
Same,  chert  is  dark  blue;  limestone  is  light-gray,  rusty,  pyritic.  ..  2005 
Fragments     shot     from     well     showing    light    bluish-gray,     finely 

crystalline  limestone  and  dense  blue  chert  with  white  coating. .   20       2010 
Mainly  blue  chert,  with  greenish,  pyritic  siltstone,  angular  Quartz 

sand  grains  and  some  limestone  as  before,  and  calcite  crystals.    .  .       2010 

Same  as  fragments,  1990-2010  feet 5       2015 

Same,  chert,  probably  70  per  cent,  with  some  greenish-gray  silt- 
stone and  black  shale 2       2017 

Same,    more    siltstone 1       2018 

Fragments  from  second  shot,  same  as  from  first  shot 9  ?    2018 

Same,  sandy   2       2020 

Odor  of  oil 2       2022 

Mostly  chert  with  a  quantity  of  green,  siliceous,  non-laminated, 
soft  shale  and  some  hard  brown  laminated  shale.  Shale  may  be 
cavings.     Some  dolomite  and  calcite,  a  few  sand  grains  and  a 

little  pyrite  4       2026 

Chert  and  fine-grained,  sandy  dolomite  and  dark-gray,  hard  shale, 

somewhat  laminated    2       2028 

Chert  and  fine  grained  sandy  dolomite;    some  calcite  and   pyrite, 

slightly  less  chert.     Slight  smell  of  oil 4       2032 

Fine-grained,  sandy  dolomite,  cream  colored  with  very  little  chert; 

some  siliceous  cement  present.     Porosity  small 4       2037 

Dolomite  sandy,  fine-grained  with  equal  quantity  of  chert.     Little 

calcite    and    pyrite 3       2040 


Xo.  4  Pennsylvania?!  si/stem 

White  shale    5         140 

Limestone    15         155 


Powers    Well — northeast   of  Decatur 


Gen.  W.   K,  W.  %,  SW.  %,  sec.  1.  T.      white  shale   55  210 

/,,-  v     R2E  Red  shale    10  220 

Brown    shale    25  245 

Curb  elevation— 691  feet  White  shale   5  250 

Feet  Feet       Brown   shale    5  255 

Pleistocene  system  Gritty  shale  10  265 

Clay    40  40       Black    shale    7  272 

Cement    gravel    25  65       White  shale    26  298 

Quick    sand    20  85      White  limestone  19  :!17 

Clay  and  gravel 5  90       Black    shale    18  335 

Black  mud    10  100       White  limestone   5  340 

Quicksand   15  115       White  shale    7  347 

Sandy  clay   5  120       White  shale   13  360 

Quicksand   10  130       Black    slate    45  405 

Black  mud    5  135       White  shale    35  440 


MACON"    COUNTY 


29 


No.  -i — Concluded 

White  limestone   10  450 

Red  shale   20  470 

Blue  lime    10  480 

White  shale   10  490 

Red  shale   7  497 

Black    shale    21  518 

Gray    limestone    36  554 

White   slate    31  585 

Black    slate    6  591 

Coal    (No.  5) 5  596 

Fire   clay    4  600 

White   slate    20  620 

White  limestone   1  621 

White  shale   24  645 

Black   shale    35  680 

Gritty  shale   40  720 

Black    shale    20  740 

Gritty   shale   with    salt 

water    20  760 

White   sand    40  800 

Black   shale    2  802 

Coal    3  805 

Broken  sand  and  water.  .  .  .31  836 

Black   shale    10  846 

White  shale   46  892 

Gritty  shale   144  1036 

Broken   sand    9  1045 

Mississippian  system 

Chester  series 

White    limestone    60  1105 

Black   shale    5  1110 

Red  shale   10  1120 

Gritty  shale   10  1130 

White  shale    20  1150 

Gritty  shale    10  1160 

Slate     10  1170 

Sand  and  salt  water 5  1175 

Partial  log  of  same  well  from  study 

of  samples 

Coal    7  809 

Shale,    light,   sandy 5  814 

Slate,  black    5  819 

Limestone     5  824 

Sand,  shale,  coarse 10  831 

Shale,   light,    gritty 5  839 

Slate,  hard    85  924 

Sand,    coarse    20  944 

Shale,     white     and     black, 

oily  smell   10  954 

Shale,   dark    5  959 

Shale,   hard    5  964 

Shale,   sandy    5  969 

Sand     15  984 

Sand,  brown,  little  shale...    5  989 

Limestone     11  1000 

Missing    70  1070 

Limestone    40  1 110 


No.  5 

Lincoln  Oil  Co. — No.  1 

Caroline  Powers 

Ml',   cor.,   SE.   Vi,  NE.   %,  sec.  5,   T. 
16  N.,  R.  2  E. 

Curb    elevation — 620    feet 


Driller's   log 

Thickness 
Feet 
Pennsylvanian  system 

White    slate    79 

Lime     10 

Blue  slate   40 

White    slate    40 

Lime     10 

White   slate    40 

Red  shale    15 

White    slate    20 

Black     shale,     set     10     in. 

pipe  at  385  feet 15 

White  shale   60 

Blue    shale    25 

Horizon  of  No.  5  coal 

White    shale     10 

Lime    (shell)     5 

White    slate    60 

Black      slate      with      little 

water    15 

Brown  slate    65 

Coal     5 

Black   shale    5 

Lime    (shell) .     5 

White    slate    15 

Lime     5 

Brown    slate     25 

Black    slate    20 

White   slate    65 

Black    slate    15 

Lime     5 

Brown  slate    10 

Black    slate    65 

Mississippian   system 

Upper  Mississippian  sub-syst 
Chester  series 

Lime     25 

Slate,   white    15 

Red   shale    15 

White  shale    20 

Lime     15 

Red    rock    40 

White  slate,  set  8  in.  pipe 

at    1055    55 

Salt   sand    10 

Salt     sand     with     lots     of 

water    30 


Depth 
Feet 

200 
210 
250 
290 
300 
340 
355 
375 

390 
450 
475 

485 
490 
550 

565 
630 
635 
640 
645 
660 
665 
690 
710 
775 
790 
795 
805 
870 


895 
910 
925 
945 
960 
1000 

1055 
1065 

1095 


3(J  OIL    JX    THE   DEOATUB   A i; I  \ 

No.  5— Concluded                   Blue  lime   25  1765 

Elue    slate    10  1775 

Lower  Mississippian   sub-system            i<ed    slate    10  1785 

Lime    65      1160      White  shale   15  1800 

Brown   lime    40       1200      Brownlime    5  1805 


Red   lime   10  1210 

Black   lime    20  12:J0 

Black   lime    85  1315      Blue  ?LaAe'  set  6%  m'  piPe 

Blue   lime    35  1350 


Gray    lime    10       1815 

lue  slate,  set  6%  in.  pipe 

at    1820    5       1820 

Yellow  lime    15       1365  Sweetland    Creek   shale. 

Blue   lime    ...............   65       1430       Brown    shale    163       1983 

Blue    slate    (break) 170       1600       Silurian  system 

Lime     40       1640       Lime     23       2006 

White    lime    100       1740      Show    oil    sand 60       2066 

\<>.  :. 

Lincoln  Oil  Co. — No.  1 

Caroline  Powers 

NW.  cor.  SE.  Yi,  XE.  %,  sec.  .7.  T.  16  X..  R.  2  E. 

Curb  elevation — 620  feet 

Partial   log  based   en  study  of  samples 

Thickness  Depth 
Feet     Feet 

Mississippian  system 

Upper  Mississippian  subsystem 
Chester  scries 

Sand,  angular,  sub-angular   and   round,   clear  white 30       1095 

Lower  Mississippian  sub-system 

Limestone,  fine  grained,  dense   white.     Sample  about  50   per  cent 

sand    like    above 65       1160 

Dolomite,    fine    grained,    dense,    black-brown,    with    fragments    of 

white   limestone  and   rounded,   white   quartz 40       1200 

Limestone,  fine  grained,  dense,   gray-brown,  with    white   limestone 

and   clear  quartz  fragments 11       1211 

Limestone,  granular,  crystalline,  gray-hlack  and  brown.  On  solu- 
tion in  HC1  leaves  thin  black  laminae  which  may  be  carbona- 
ceous in  composition  as  well  as  containing  considerable  argilla- 
ceous material.  Few  fragments  of  white  limestone.  Quartz 
grains    common     20       1230 

Same,  but  black  laminae  fewer  and   very  small 85       1315 

Limestone,  fine  grained,  bastard   limestone  and  very  fine  grained 

gray  sandstone.     73  per  cent  insoluble  in  HC1 35       1350 

Sandstone,   very    fine,   buff    calcareous.     98    per   cent    insoluble    in 

HC1    15       1365 

Sandstone,  very  fine-grained,  gray  calcareous.  67  per  cent  insolu- 
ble in  HCI 65       1430 

Shale,    gray    clay,    slightly    calcareous 170       1600 

Dolomite,    porous,    argillaceous,    gray 15       1615 

Limestone,   white,  granular,  oolitic    (?) 1615 

Limestone,    granular    gray-white    with    much    blue    chert.     Sample 

about   70   per   cent   chert ■ 15       1655 

Limestone,  granular  white  with  much  blue-white  chert  and  a  few 

small,   angular,  clear   sand   grains 95       1740 

Quartz,  clear  angular:  chert,  white,  and  shale,  greenish-gray  cal- 
careous.    About  equal  amounts  of  each 2~>       1765 


MACON    COUNTY  31 

No.  5 — Concluded 

Shale,  green-gray,  calcareous,  with  fragments  of  fine  grained, 
dense,  white  limestone,  brown  limestone  and  green-gray  calcare- 
ous  shale 10       1775 

Limestone,  white;  shale,  dark  gray;  chert,  white;  angular  clear 
quartz    fragments;    green-gray    shale    20    per    cent    insoluble    in 

HC1    10       1785 

Shale,  greenish-gray  ;  clay 15       1800 

Limestone,  pink,  purplish,  green-gray  and  white;  crystalline  lime- 
stone    with     chert     and     green-gray     shale     fragments.     Crinoid 

stems,    fragments    common 5       1805 

Limestone,  dense,  fine  grained,  greenish-gray  and  buff-white 10       1815 

Shale,  dark  green  or  siltstone,  noncalcareous,  no  spores 5       1820 

Sivectland  Creek  shale 
Shale,  black,   containing  Sporangites,   commonly  the  thin   walled 

type;   also  green  shale  from  above 100       1920 

Missing    63       1983 

Silurian  system 

Limestone,  fine  grained,  crystalline,  white  to  faint  tan  tinge.  About 
50  per  cent  of  sample  blue-white,  blue-green,  and  white  translu- 
cent chert.     Seme  fragments  of  greenish  siltstone 5       1988 

Same,  but  limestone  buff  colored.     Less  chert 5       1993 

Like  the  last;  42  per  cent  insoluble  in  HC1,  dolomitic 5       1998 

Dolomite,  fine  grained,  buff  colored,  with  chert  fragments;    24  per 

cent  insoluble  in  HC1 5       2003 

Like  last  with  20  per  cent  chert,  mostly  dolomitic 3       2006 

Like  last,   10   per  cent  chert 4       2010 

Same,    less   dolomitic    1       2011 

Same,  chert  40  per  cent 4       2015 

Same,  darker  buff,  more  dolomitic  chert,  50  per  cent;   few  angular 

quartz    grains    5       2020 

Same,  light  brown  in  color,  chert  10+  per  cent 5       2025 

Same,  chert  20   per   cent 10       2035 

Same,  chert  5  per  cent 5       2040 

Same,  but  gray  colored  with  considerable  green-gray  dolomite...      5       2045 
Dolomite,    fine    grained,   crystalline,   green-gray,    with   only    a   few 

fragments   of   buff   dolomite 5       2050 

Same,   without  buff  dolomite 10       2060 

Seventy-seven  feet  into  Silurian  ("Niagara")  limestone.  Upper  17 
feet  dry;  next  45  feet  showed  oil,  and  last  15  feet  dry.  Made  very  little 
bottom  water.  Best  pay  between  2020  and  2040  feet.  Pay  ends  at  2045 
feet.  Top  pay  1998  feet.  Steel  line  run  before  shot  showed  124  feet  fluid, 
about  75  feet  oil. 

No.  6  x  Shale     655         860 

Mississippian   system 
Lincoln  Oil  and  Gas   Co.— No.   2  Upper  Mississippian  sub-system 

„  Chester  series 

Caroline  Poioers  farm  Lime  15         875 

.Sir.    V  XE.   H,  sec.  5.  T.  16  N.,  R.      Shale,  white   15         890 

.>  E.  Lime     13         903 


Curb  elevation — 631   feet 


Shale,    red    12  915 

Shale,    white    20  935 

Driller's  log                                                      Lime     5  940 

Thickness  Depth      Shale,  red    20  960 

Feet     Feet      Shale,    white    60  1020 

Pleistocene  system                                        Lime   15  1035 

Drift     121         121      Shale,    green    3  1038 

Pcnnsylvanian  system                                  Lime,  blue,   salt  water 10  1048 

Shale     69         190      Shale,    green    12  1060 

Lime     15         205       Lime     5  1065 


32 


OIL    IN    THE   DEOATUK   A|;i,a 


\«i.  6— Concluded 

Slate,   black    5  1070 

lame 10  1080 

Lower  M  iss  iss ii>p ian  s  u  b-s  ys  tem 

Lime,   hard    70  1150 

Lime     10  1160 

Lime,    brown    40  1200 

Lime,   black    25  1225 

Lime,    gray     55  1280 

Lime,   blue    75  1355 

Lime,   yellow    10  1365 

Lime     55  1420 

Slate,    blue    170  1590 

Lime,   blue    30  1620 

Lime     45  1665 

Lime,   white    75  1740 

Lime,    blue    20  1760 

Slate,  white    55  1815 


Lime 20 

Bweetland  Creek  shale 

Shale,  brown    149 

Silurian  system 

Oil    sand    96 

Lime,    blue    120 

Lime      and      sand,      little 

water    40 

Water  and   oil    (?) 5 

Lime     55 

Lime     85 

Ordovician  system 
Maquokcta   shale 

Slate,   blue    50 

Lime     65 

Slate,    brown    70 

■■Trenton"  formation 
Rock       (Oil      show      2625- 

2700     230 


1835 

1984 

2080 
2200 

2240 
2245 
2300 
2385 


2435 
2500 
2570 


2800 


\<>.  6 
Lincoln  Oil  and  Gas  Co. — No.  2 

Caroline  Powers  farm 

SW.  %,  NE.  1,,  .ST,-.  .7.  T.  hi  N.,  R.  2  E. 

Curb  elevation — 631  feet 

Log  based  on  .study  of  samples 

Thickness 
Feet 
Pennsylvanian  system 

Limestone,  medium  to  light  gray,  subcrystalline,  some  fossil  frag- 
ments noted,  either  small  stems  or  spines;  some  pyrite  and  gray 

shale    and    sand    grains 15 

Missing    660 

Mississippian   system 

Chester  scries 
Limestone,  medium-gray,  subcrystalline,  medium  grained;    a  dark 
gray  shale,  hard,  some  greenish  shale,  some  sand  and   pyrite..   15 

Missing    140 

Mixture  of  fine-grained,  angular  sandstone  and  dark  and  medium- 
grained  shale,  some  limestone,  some  red  shale,  some  pyrite. ...   15 

Shale,  light  grayish-green,  calcareous,  some  fine  grit 3 

Sandstone,  fine-grained,  angular,   some  about  1/5  shale   like  last; 

some  red  to  purple  shale;   some  limestone  fragments 10 

Shale,   medium-gray,   hard,   smooth,   some   pyrite 12 

Missing    5 

Shale,  darker  than  last,  brownish-gray,  some  limestone,  some  sand     5 
Sandstone,  light-gray,  fine  calcareous,  shaly,  some  dark  shale,  some 

pyrite     1" 

sic.  Genevieve,  st.  Louis-Salem  limestone 
Limestone,  light  tan-gray,  fine  grained,  dense,  a  coarsely  plicated 
fossil  fragment  noted    (probably  a   Spirifcr),  some   fine  angular 

sand,   shale,   pyrite   and    limonite 70 

Limestone,  mixture  of  dark  tan  limestone  and  white  limestone, 
some  sand,  shale  and  pyrite.  Some  small  fragments  adhere  to 
some  larger  ones  and  are  brown,  giving  the  appearance  of  a 
lump  of  brown  sugar    (oil?) 10 


Depth 
Ft  i  / 


205 
865 


SSO 

1020 

1035 
1038 

1048 
1060 
1065 
1070 

1080 


1150 


1160 


MACON    COUNTY  33 

No.   0 — Concluded 

Limestone,  dark,  some  tan-gray  and  some  gray,  fine-grained,  dense, 

impure,  some   gray   shale 40       1200 

Limestone,    dark    gray,    dense,    siliceous.     Some    fossil    fragments 

noted,   among  them   a   crinoid   stem,    occasional    shale    or   chert 

fragments  and   sand    grains 5       1225 

Limestone,    medium-gray,    fine-to    medium-grained,    subcrystalline, 

some    darker    limestone 55       1280 

Limestone,  darker  than  last.     Some  almost  black,  some  sand....   75       1355 

Osage-Warsa wf  formations 
Sandstone,   exceedingly   fine,   angular   sand,   brownish    gray,   some 

shale    and    limestone 10       1365 

Mixture    of    shale   and    gray,    subcrystalline   limestone,    some    fine 

sand    55       1420 

Shale,   medium   gray,   smooth    hard 170       1590 

Limestone,   gray,    impure,   shaly,    fine-grained;    some   darker   gray 

shale    30       1620 

Keokuk-Burlington  limestone 
Limestone,  light-gray,  subcrystalline,  about  y2  dark  or  light  chert  45       1665 
Limestone,  light-gray,   subcrystalline,   sample  about   1/3   chert....   85       1740 
Limestone,    light-gray    and    light-green,    subcrystalline    limestone, 

about    v2   gray   and   pink   chert 20       1760 

Shale,  light-gray,  slight  greenish  cast,  calcareous 55       1815 

Limestone,  light  greenish-gray,  shaly,  some  gray  shale,  some  chert.   20       1835 

Sweetland  Creek  shale 
Shale,   hard,  dark-gray,  smooth;    some  greenish-gray,   some   lime- 
stone  and   chert   fragments 40       1875 

Shale,  hard,  chocolate-brown,  containing  Sporangites  huronensis . .   46       1921 
Silurian  system 

Missing     139       2060 

Limestone,  dark-gray,   fine-grained,  dense,  shaly;    some  pyrite  and 

shale;    some    mica 120       2180 

Limestone,   dark,  greenish-gray,   shaly  and   light   gray,   crystalline 

limestone     20       2200 

Like  preceding,   some   greenish-gray   shale 45       2245 

Limestone,  light-gray,  sample  has  slight  green  cast,  subcrystalline 

to  crystalline;    some  darker   sugary   limestone 35       2280 

Limestone,  light-gray,  subcrystalline;  some  green  shale,  some  chert  25       2300 

Missing     15       2315 

Like  the  last,  slightly  darker 15       2330 

Limestone,  medium-gray,  subcrystalline,  medium  to  coarse  grains; 

some  pinkish  limestone,  some  green  and  gray  shale  and  pyrite.    20  ?    2340 

Like  preceding,  slightly  darker;    no  pink  limestone 10       2350 

Limestone,  tan-gray,  subcrystalline;  some  chert,  pyrite  and  shale, 

one  green  speck  in  the  limestone  noted 25       2375 

Ordovician  system 

Maquoketa  shale 
Shale,  medium-gray,  hard,  smooth,  silt  shale,  some  limestone  frag- 
ments         60       2435 

Like  preceding,   about   1/3   limestone 15       2450 

Kimmsurick-Plattin  ("Trenton" ) 
Limestone,    dolomitic.   light,    tan-gray,   subcrystalline,   about    ]i    of 

sample    is    gray    shale 130       2280 

Like    preceding,    slightly    less    shale 25       2605 

Limestone,  dolomitic,  light  tan-gray,  subcrystalline  to  crystalline, 

medium-grained,    some    gray    shale 15       2620 

Like    preceding,    less    shale 40       2660 


::i 


OIL    l\    THE   DECATUB    AREA 


No.  ; 

Pfeiffer  farm — Xo.   3 

SE.    ',.    NW.    ',.    XE.    %,    sec.   5,    T. 
16   A'..    B.   2   E. 


Curb  elevation — 664  feet 


Thickness 
Ft.  in. 


Pleistocene  system 

Soil     30 

Gravel    and    sand. . . .120 
Pennsylvania?!  system 

Slate     45 

Elack   shale    20 

White    limestone    ...  32 

Black     shale     11 

White   limestone    ....  4 

White    shale     38 

White    limestone     ...  5 

White    shale     35 

White  limestone   ....  10 

Black    shale    5 

White   shale    10 

White    limestone     ...  13 

Coal    2 

White   shale    10 

Red    rock    4 

Brown    shale    15 

AVhite    shale    11 

Blue    shale    25 

White   shale    28 

Blue  limestone 5 

White  shale   38 

Horizon   of  No.  5  coal 

Black   shale    3 

White  shale    40 

Black  slate    2 

White   shale    3 

Brown    shale    56 

Black    shale    65 

Sandy   shale    25 

Black    shale    5 

Limestone   23 

Black    shale    3 

Limestone   9 

Black  slate   6 

White  shale  mixed 
with  shells  of  lime- 
stone      9 

Black    shale     14 

Blue  limestone 9  6 

Blue    shale    8  6 

White   shale    6    .  . 


Depth 
Ft.  in. 

30 
150 

195 
215 

247 
258 
262 
300 
305 
340 
350 
355 
365 
378 
3  SO 
390 
394 
409 
420 
445 
473 
478 
516 

519 

559 
561 
564 
620 
685 
710 
715 
738 
741 
750 
756 


765  .. 
778  .. 
789  6 
79S  .. 

804  .. 


\'o.  8 
Atlantic  Oil  and  das  Company 
Bledsoe   form — Xo.    t 

sw.  1,.  si-:,  i,.  sec.  5,  r.  it;  .v..  r. 
t  /•;. 

Curb  elevation— 614.5  feet 

Thickness  Depth 
/•'/.   in.      Ft.  in. 

Pleistocene  system 

Soil,   soft    drilling 12   .  .  .       12   . . 

Gravel,  soft  drilling.  .   9  . . .       21    .  . 

Clay,  soft  drilling 9   ...        30   .  . 

Cement     gravel,     hard 

drilling    20    ...        50 

Quicksand,     filled     up 
in   pipe    18   ...       68 

Red  mud,  soft  drilling  5   . . .        73    .  . 

Clay,      yellow,      soft 

drilling .17    ...       90   .  . 

Ahid,  brown,  soft  drill- 
ing     15   ...     105 

Pennsylvanian  system 

Shale,  blue,  soft  drill- 
ing     30 

Shale,    blue    20 

Shale,    brown     15 

Shale,    blue    5 

Shale,   hard    15 

Lime,    gray,    hard.  ...    7 

Shale,    blue,    soft 8 

Lime,    gray.    hard.  ...   9 

Shale,   soft    76 

Lime,    gray,    hard.  ...  10 

Shale,   soft    37 

Lime,    gray,    hard.  .  .  .    (i 

Red    rock,    soft 12 

Lime,  hard   8 

Shale,    white,    soft.  ...    7 

Lime,   blue,   soft 2."> 

Shale    10 

Lime,    hard     4 

Shale,  blue,   hard 26 

Lime,  hard    B» 

Shale,    white    1  5 

Shale,  black  or  dark. 20 
Horizon   of  Xo.    ~i  coal 

Shale,    white    35 

Lime,    hard    3 

Shale,   blue    7 

Shale,    white,    soft 35 

Shale,    gray,    soft In 


135 

155 

170 
IT.". 
190 
197 
205 
214 
290 
300 
337 
343 
355 
363 
.",7(i 
395 
105 
409 

445 

460 

(SO 

5 1 5 

.".IN 

525 
565 

•">  7  -"> 


MACON    COUNTY 


35 


No.  8 — Concluded 

Shale,    brown    55   .  . .  630 

Shale,   white    5   ...  635 

Shale,    black,    hard... 25   ...  660 

Shale,   gray,    soft 20   ...  680 

Shale,    black    5    . . .  685 

Lime,    hard    20    . .  .  705 

Shale,    brown    10    .  .  .  715 

Lime,    gray    18    ...  733 

Shale,    blue    7   ...  740 

Shale,    gray,    hard.... 10   ...  750 

Shale,    blue,    soft 75   ...  825 

Shale,    black    55   . .  .  850 

Shale,  gray   25    . . .  875 

Shale,    white    10   .  .  .  885 

Mississippia?i  system 

Upper  Mississippian  sub-system 
Chester  series 

Lime     35   ...  920 

Red   rock    10   .  . .  930 

Shale,   dark    5   . .  .  935 

Lime,    gray    15   ...  950 

Shale,    gray    15    . . .  965 

Lime,  hard   5   ...  970 

Shale,    blue    20    .  .  .  990 

Red    rock    5    .  . .  995 

Lime,    hard    5   ...  1000 

Red    rock    10   ...  1010 

Sand    water,    white... 20   ...  1030 

Shale,   white    35   ...  1065 

Sand    water,   white... 25   ...  1090 

Shale,    white    3   ...  1093 

Lower  Mississippian  subsystem 

Lime,  gray    87    ...  1180 

Lime,  red   10   ...  1190 

Lime,  blue    35    ...  1225 

Lime,  brown    25   ...  1250 

Lime,  blue    10    ...  1260 

Lime,   brown    5   ...  1265 

Lime,    gray    17   ...  1287 

Slate,   blue    3   ...  1290 

Lime,    gray    30   ...  1320 

Coal    2    ...  1322 

Lime,    gray,    sandy... 28    ...  1350 

Lime,  brown    5    ...  1355 

Lime,    gray    50    ...  1405 

Slate,  blue    15    ...  1420 

Lime,    gray,    sandy... 30    ...  1450 

Slate,    white    57   ...  1507 

Lime,  gray   13   ...  1520 

Slate,  gray,  sandy.... 20   ...  1540 

Lime     10   ...  1550 

Slate,    gray    75    ...  1625 

Lime,    white,    hard..  105    ...  1730 

Lime,  blue,   hard 65    ...  1795 


Red    rock    5   ...  1800  . . 

Lime,  brown,   hard...  12   ...  1812  .. 

Slate,    gray,    soft 20   ...  1832  .. 

Lime,    gray,    hard.... 23   ...  1855  .. 
Sweetland  Creek  shale 

Shale    25    ...  1880  .. 

Lime,    gray    5   ...  1885  . . 

Shale,  brown   103    ...  1988  . . 

Silurian  system 

Lime     10   ...  1998  .  . 

Producing  oil   sand...   6    ...  2004  .. 

Lime,    flinty     28    ...  2032  .. 

Sand,  showing  oil 30  6  2062  6 

No.  9 

Well  located  g%  miles  8.  and  *4  mile 

East  of  Pfeiffer  well   (No.  SJ 

NE.  cor.  SE.  H,  SE.  %,  see.  8,  T.  16 
N.,  R.  2  E. 

Curb  elevation — 602  feet 

Thickness  Depth 

Ft.  in.  Ft.  in. 
Pleistocene   system 

Soil    20    .  . .  20  . . 

White  mud   50    .  . .  70  . . 

Quick  sand    15   ...  85 

Yellow  mud    15   .  .  .  100  .  . 

Black   mud    20   .  .  .  120  . . 

White  mud   10    . .  .  130  .  . 

Blue  mud    5    . . .  135  . . 

Black   mud    25   .  . .  160  .  . 

Brown    mud    10    .  .  .  170  . . 

Pennsylvania n   system 

Limestone     5    ...  175  . . 

Black    shale    25    .  .  .  200  . . 

Limestone    10    .  . .  210  .  . 

White  shale    5    .  .  .  215  . . 

Brown    shale    85    . . .  300  . . 

White    shale     20    .  .  .  320  . . 

White  limestone    ....    15   ...  335  . . 

Brown    shale    15   .  .  .  350  . . 

White  limestone    10    .  .  .  360  .  . 

Red  rock    9    . . .  369  . . 

White   shale    15    . .  .  384  . . 

Brown    shale    16    . .  .  400  .  . 

White  shale    114    ..  .  514  .  . 

Coal    (No.   5) 2    ...  516  .  . 

Brown    shale    44   .  .  .  560  .  . 

Gray   shale    73  6  633  6 

Hard   shell    2   ...  635  6 

Coal     4  6  640  .. 

White  shale    40    .  .  .  680  . . 

Black    shale    40    .  . .  720  . . 


;;.; 


OIL    1\    THE   DECATUR    AREA 


No.  in 

Decatur  Coal  Company — Shaft  No.  1* 

Sec.  11  f,   T.  16  X..  R.  2  E. 

Curb  elevation — 672  feet 

Thickness  Depth 
Ft.  in.      Ft.  in. 

Pleistocene  system 

Surficial  deposits, 
consisting  of  clay, 
sand,  hardpan,  and 
two  distinct  forest 
beds    110  6         110  6 

Pcnnsylvanian  system 

Shale,  argillaceous  .  .   52  6         163 

Shale,   bituminous    .  .     3   . . .      166 

Shale,   calcareous    ...   14   ...      180 

Sandstone,    marly...      1    ...      181 

Shale,   calcareous 32    .  . .      213 

Sandstone,  argilla- 
ceous           5   ...     218 

Shale,    red 2   ...     220 

Limestone,  argilla- 
ceous          8    . . .     228 

Shale,  brown 7    ...      235 

Limestone,  argilla- 
ceous           2   ...     237   . , 

Shale,   calcareous 2  6         239  6 

Coal   and    bituminous 

shale     2    ...     241  6 

Shale,    calcareous....     5  6         247   .. 

Shale,    brown 2   ...     249   .  . 

Sandstone,  argilla- 
ceous         41  8         290  8 

Coal    6         291  2 

Shale,    argillaceous..      8  6         299  8 

Limestone,   nodular..      9    ...     308  8 

Shale,   calcareous.  ...     5   .  . .      313  8 

Shale,    argillaceous..    10    ...      323  8 

Limestone,    hard 9    ...     332  8 

Shale,    argillaceous..     2  6         335  2 

Shale,    bituminous...     2    ...     337  2 

Shale,    argillaceous..    12    .  . .     349  2 

Limestone,    hard....      7  6 

Limestone,  argilla- 
ceous          16 

Shale,  black  and  gray     1    .  . 

Shale,    argillaceous.  .     3  6 

Limestone,  argilla- 
ceous           16 

Shale,  black  and  gray     1    .  . 

Shale,    argillaceous.  .      3  6 

Limestone,  argilla- 
ceous         20  6         383 

Shale,    argillaceous..     9   ...     392 

Sandstone,  argilla- 
ceous         27  6         419 

Shale,   calcareous 2    ...      421 

Shale,    bituminous. . .      L  6         423 

Coal  6  1    429 


356  8 

358  2 

359  2 
362  8 

358  2 

359  2 
362  8 


Shale,   argillaceous, 

nodular    

Shale,  argillaceous, 

slaty    

Limestone,        hard, 

gray    

soft 

bituminous.  .  . 
argillaceous. . 

brown 

calcareous    . . . 
argilla- 


Shale, 

Shale, 

Shale, 

Shale, 

Shale, 

Limestone, 
ceous     

Shale,    calcareous.... 

Shale,  red,  variegated 

Shale,    gray,    argilla- 
ceous     

Shale,    bituminous    .  . 

Shale,     gray,    argilla- 
ceous      

Shale,    bituminous... 

Shale,    gray,    calcare- 
ous     

Shale,    bituminous... 

Coal  and  limestone.  . 

Shale,    bituminous... 

Limestone,    soft 

Shale,    argillaceous.. 

Shale,   bituminous... 

Coal    

Shale,  gray 

Limestone,        argilla- 
ceous     

Shale    

Limestone     

Coal    

Shale,    blue  and    gray 

Sandstone,    marly  . . . 

Shale,   calcareous.  .  . . 

Sandstone   

Slate,  gray 

Shale,    bituminous.  . . 

Coal    (No.  5) 

Fire  clay  

Missing    

Limestone     

Coal    

Missing    

Limestone     

Missing     

Coal    

Missing    

Coal    

Missing    

Coal    

Missing    

Coal     

Missing    

Coal    

Missing    

Limestone    


15   .  . 

19   .. 

17    .. 
1  6 

1  .. 
4  6 

.  .    6 
9  3 

2  .. 

3  3 


18    .. 
3  3 

1  3 
1  6 

6   .. 
1    .. 
1    .  . 
.  .    6 

1  .  . 

2  .. 


6  9 

.  .  6 
2  10 
.  .    6 


444  3 
463  3 

480  3 

481  9 

482  9 
487  3 
487  9 
497   .. 

499    .. 

502  3 
511    3 


529 
532 


533  9 
535  3 


541 

542 
543 
543 
544 
546 
547 
548 
548 

555 
556 
558 
559 
573 
575 
580 
595 
601 
603 
606 
608 
657 
660 
662 
682 
685 
720 
722 
749 
750 
783 
785 
805 
810 
839 
840 
853 
855 


in 

4 

9 

3 

3 

3 

3 
9 
9 


*  Record  of  shaft  to  a  depth  of  608  feel  9  Inches  is  taken  from  Vol.  VII,  p.  17 
of  tin-  111.  Geological  Survey  Worthen  reports.  The  remainder  of  the  log  repre- 
sents estimated   thickness,  s  ami  depths  and  should   not   he  considered   as   accurate. 


MACOX    COUXTY 


37 


Xo.  11 

Decatur  Coal  Company — Shaft 

NW.    hi,   SW.   %,   sec.   J'h   T. 
R.  2  E. 

Curb  elevation — 607  feet 

Thickness 
Ft.  in. 

Pleistocene  system 

Soil  and  loamy  clay.   25  . .  . 

Sand  and  water  (flow 
of    400    gallons    per 

minute)    30  . 

Clay,  blue    4  . 

Drift  wood  and  soil .  .     2  . 

Sand,    green     4  . 

Sand,  gray    6  . 

Clay,    hard    blue 9  . 

Sand   and    gravel ....   53  . 

Pennsylvanian  system 

Hardpan     23  . 

Sandstone    1  C 

Shale,    soft    G  . 

Shale,  gray  and  blue 

sandy    28  . 

Clay  shale 15  . 

Slate,   blue    7  . 

Fire  clay,  ferruginous     6  . 

Conglomerate        lime- 
stone          7  . 

Slate,    brown    10  . 

Flint  stone   2  6 

Slate,   black    1 

Flint    rock    2  6 

Coal     10 

Fire  clay   8 

Shale,    blue   sandy...   10  .. 

Flint  stone    3 

Clay   shale    5 

Shale,  sandy 21 

Slate,  black    2  6 

Coal     1  . . 

Fire   clay    6 

Shale,     black     and     1 

inch  of  coal 8  1 

Fire  clay  6  . 

Shale,  black   3  . 

Limestone,    impure    .     1  . 

Shale,   brown    8  . 

Sandstone    1  . 

Slate,  black    4  . 

Flint  stone    11  . 

Slate,   black    12  . 

Fire    clay    4  . 

Limestone  10  . 

Slate,  black  2  . 

Fire  clay  8  . 

Clay  shale  13  . 

Sandstone  5  . 

Flint  stone  2  . 

Slate,  blue  8  . 


So.  2 

16   N., 


Depth 
Ft.  in. 


25 


55 

59 

61 

65 

71 

80 

133 

156 

157 

6 

163 

6 

191 

6 

206 

6 

213 

6 

219 

6 

226 

6 

236 

6 

239 

242 

6 

243 

4 

251 

4 

261 

4 

264 

4 

269 

9 

290 

4 

292 

10 

293 

10 

299 

in 

307  11 
313  11 

316  11 

317  11 

325  11 

326  11 
330  11 
341  11 
353  11 
357  11 
367  11 
369  11 
377  11 
390  11 
395  11 
397  11 
405  11 


Shale,  clay    31 

Sandstone,  blue   1 

Slate,   black    3 

Coal    1 

Fire  clay  6 

Shale,    sandy    10 

Shale,  black    33 

Slate,  hard  black   ...     5 

Coal    (local)    

Fire  clay    4 

Limestone    11 

Shale,    black     4 

Shale,  clay    2 

Coal     4 

Fire    clay    2 

Conglomerate  stone..     3 
Clay   shale,  gray   and 

blue   14 

Slate,    black,    and    % 

inch    coal    4 

Fire    clay    4 

Sandstone    7 

Shale,    gray    6 

Slate,   black    2 

Coal     14 

Clay  shale  6 

Coal    2  10 

Shale,   hard  gray    ...     8    .  . . 

Limestone    2  6 

Bituminous  shale  and 

coal    6 

Fire  clay   4 

Sandstone    17 

Clay   shale    3 

Sandstone    13 

Clay  shale,  dark 8 

Slate,  black    16 

Coal     (No.    5) 4  6 

No.   12 

Manufacturers   and   Consumers    Coal 
Co.— Shaft  No.  1* 

NF.  cor.,  sec.  22,  T.  16  N..  B.  2  E. 

Elevation— 614.78  feet 

Partial  log 


436  11 

437  11 
440  11 
442  3 
448  3 
458  3 
491  3 
496  3 
496  6 
500  6 
511  6 
515  6 
517  6 
517  10 
519  10 
522  10 

536  10 

540  10 
544  10 
551  10 
557  10 
559  10 
561  2 
561  8 
564  6 
572  6 
575  .. 


575 
579 
596 
599 
612 
620 
622 
626 


Thickness  Depth 
Ft.  in.      Ft.  in. 


Limestone     5   . 

Coal    8 

Limestone     10   . 

Limestone     8   . 

Coal    1  6 

Limestone     8    . 

Limestone     15    . 

Coal    1   6 

Fire    clay    3    . 

Coal    1  6 

Limestone     3    . 

Coal    4  2 


150 
208 
250 
275 
348 
408 
440 
486  6 
489  6 
491  . 
510  . 
560  . 


•Thicknesses  and  depths  are   approximate. 


38 


oil.    IN    THE    DECAT1  i;    \i:i.  \ 


Manufac'urers   and   Consumers   Coal 

Co.— Shaft   NO.    !*. 

NE.  cor.  sec.  22,  T.  la  X..  R.  >.  !■:. 

Curl)  elevation — 615  feet 

Partial   log 

Thickness   Depth 

Ft.   in.  Ft.  in. 

Coal     .  .    10  240 

Coal    12  295 

Limestone     10   ...  340   . . 

Limestone     15    ...  365   . . 

Coal     IS  435   .  . 

Coal    3  495    . . 

Limestone     10   ...  505   .. 

Coal     5   ...  560    .  . 

No.    11 
Niantic   Coal   Go. — shaft 


I.'.    T.    Id  x. 


r.  1  ir. 


Curb  elevation — 601. 5   feet 

Thickness 
Ft.  in. 
Pleistocene  system 

Soil    and    brown   clay. 11  ... 

Sand   and    gravel 4  ... 

Gravelly    hard    pan... 25  ... 

Blue  hard   pan :  10  ... 

Soft    clay    15  ... 

Gray   hard   pan 10  ... 

Soft    brown    clay 7  ... 

Pennsylvanian  system 

Limestone     10  . .  . 

Blue  flinty  rock 2  ... 

Black    slate    3  ... 

Fire   clay    6  ... 

Limestone     10  ... 

Blue   and    gray   shale.    7  ... 

Black  shale    1  ... 

Coal    2 

Fire    clay    1  ... 

Nodular    limestone    . .   5  ... 

Clay   shale    5  ... 

Soft    blue    sandstone.  .  lti  ... 

Gray  shale   42  ... 

Coal    1  3 

Fire    clay     2  6 

Sandstone     10 

Cray    shale    45 

Hard    flinty    rock 10 

Black   shale    3 

Fire   clay    9 


Depth 
Ft.  in. 

11  . . 

15  . . 

40  .. 

50  .. 

65  .  . 

75  .. 

82  .. 

92  .. 

94  .. 

97  .. 

103  .. 

113  .. 

120  .. 

121  .. 

121  2 

122  2 
127  2 
132  2 
148  2 

190  2 

191  5 
193  11 
203  11 
248  11 
258  11 
261  11 
270  11 


Blue    and    red    shales. 15    ...  285  11 

Black    slate    5    . .  .  290  11 

Coal    13  292  2 

Fire    clay    4  6  296  8 

Black   shale    11    ...  307  8 

Coal    2  6  310  2 

Clay    shale    15    ...  325  2 

Black   shale    3   ...  328  2 

Coal   (local)    10  329   . . 

Fire  clay   2    ...  331 

Gray   shale    14    .  .  .  345    .  . 

Hard    black    roc  k, 

(limestone)     1    .  .  .  346   .  . 

Black    slate    3    .  .  .  349    .  . 

Ccal   (Xo.  5) 5  6  354  6 


Xo.    17 
Kclley  well 

NE.   cor..    8E.    ',.   XE.    y±,  see.  SO,    T. 

15  .v..  R.  >  /•;. 

Curl)  elevation — 692  feet 

Thickness  Depth 

Feet  Feet 
lii  istccene  .si/siiin 

Drift    176  176 

Pennsylvanian    system 

Brown    shale....' 5'.'  2:::. 

Black    shale 10  245 

Blue    shale 7  252 

Limestone     8  260 

White    shale 9  269 

Sandstone    20  289 

Black    shale 15  304 

Blue    shale 11  315 

Limestone     5  320 

Blue    shale 5  325 

Limestone     15  340 

Black    shale 16  356 

Limestone     8  364 

Blue    shale 12  376 

White  shale 11  387 

Brown    shale 12  399 

Sandstone     5  404 

Brown    shale 31  435 

White  shale 25  460 

Brown  shale   28  488 

Limestone     30  522 

Blue    shale 23  545 

Black    shale 15  560 

Limestone     12  572 

Black    shale 8  580 

Limestone     3  583 

Blue    shale 18  601 

White  shale 12  613 

Black    shale 7  620 

Limestone     3  623 

Blue    shale 37  660 


♦Thicknesses  and  depths  arc  approximate. 


MACOX    COUXTY 


39 


No.  IT — Concluded 

Horizon  of  Xo.  5  coal 

Black    shale 10  670 

White    shale    33  703 

Blue    shale 22  725 

Brown    shale 50  775 

Black    shale 8  783 

Blue  shale   53  836 

Limestone     6  842 

Brown    shale 70  912 

Black    shale 58  970 

Blue    shale 52  1022 

Black    shale 5  1027 

Sandstone     30  1057 

Blue    shale 6  1063 

Black    shale 10  1073 

Blue    shale 5  1078 

Black    shale 12  1090 

Mississippian  system 
Chester  series 

Limestone     40  1130 

Blue    shale 18  1148 

Red  shale 8  1156 

Limestone     2  1 15S 

White  shale 12  1170 

Blue    shale 13  1183 

Limestone     4  1187 

Blue    shale 51  1238 

Red  shale 4  1242 

Limestone  and  salt  water.    18  1260 

White   shale 6  1266 

Sandstone   37  1303 

Red  shale  and  salt  water.     5  1308 

Xo.   IS 

Blue  Mound  well 

XW.  cor.  XE.  14,  SW.  14,  sec.  32.  T. 
15  X..  R.  1  E. 

Curb  elevation— 607  feet 

Thickness  Depth 

Ft.  in.  Ft.  in. 
Pleistocene  system 

Clay   and    sand 18   . . .  18   . 

Sand    5   .  . .  23    . 

Clay,   coarse  gravel..     3    ...  26    . 

Cemented  clay,  gravel     5   . .  .  31   . 

Blue    clay    22    .  .  .  53    . 

Cemented  clay,  gravel     3    . .  .  56    . 

Clay    and    sand 14    .  .  .  70    . 

Cemented  clay,  gravel     3    .  .  .  73   . 

Boulders  and  gravel .     2    .  .  .  75    . 

Soft   clay   and    shale.   23    . .  .  98    . 

Soft  clay    1   . .  .  99    . 

Pennsylvanian  system- 

Black   shale    1   .  .  .  100    . 

Bone  coal    6  100  6 

Soft  clay  and  shale..    10  6  111    . 

Sand  shale    3    ...  114    . 


Limestone    5 

Sandstone    6 

Clay    shale    9 

Clay    shale    20 

Clay   shale    9   . . . 

Clay  shale  with  hard 

bands    22 

Clay    shale    6 

Limestone    9 

Blue    clay    shale 1    . .  . 

Black   shale    4 

Dark  blue   shale 7  10 

Bone    2 

Fire    clay    5 

Bastard    limestone    .  .     7    .  .  . 

Blue  clay  shale 7 

Limestone    1 

Light    clay    shale....      6    .. 
Sand     and     limestone 

mixed  with  shale..     5    .., 

Sandy  shale    11 

Sandy  shale  5 

Sand   shale    8    . . 

Sand   shale    7 

Clay  shale   16 

Clay  shale 10 

Black   shale    1 

Coal     6 

Fire    clay    16 

Clay   shale    9 

Clay  shale  with  hard 

bands    17 

Clay  shale  with  hard 

bands 22 

Black  clay  shale. .'.  . .   15 
Clay  shale  soft,  with 

cave     12 

Red  soapstone,  soft..     5   .. 
Red  soapstone,  soft..     3    .. 

Limestone      4 

Clay    shale    6 

Clay   shale    14 

Clay    shale    6 

Clay    shale    4 

Clay    shale    9    .  . 

Dark  blue  shale 4  8 

Coal     2  6 

Fire  clay   16 

Coal     8 

Clay  shale  13  8 

Limestone   4  6 

Clay  shale   4  3 

Coal     3  6 

Shale    13 

Limestone    4  6 

Clay  shale   10 

Clay  shale   7    .  . 

Black   shale    3 

Coal,   clean   parting..     5  3 

Fire  clay    16 

Clay    shale    8  3 

Clay   shale    14 

Clay    shale    12 


119   .. 

125  .. 
134  .  . 
154  .  . 
163    .. 

185  .. 

191  .. 

200  .. 

201  .. 
205  .  . 

212  10 

213  .. 
218  .  . 
225    .. 

232  .. 

233  .. 
239    .. 

244  .  . 

255  .. 

260  .. 

268  .. 

275  .. 

291  .  . 

301  .. 

302  .. 
302  6 
304  .  . 

330  .. 

350  .. 
365  .. 

377  .. 
382  .. 
385  .. 
389  .. 
395  .. 
409  .. 
415  .. 
419  .. 
428  .  . 
432  8 

435  2 

436  8 

437  4 
451  .. 
455  6 
459  3 

463  3 

464  6 
469  .. 
479  .. 
486  .. 
489  .. 

494  3 

495  9 
504  .. 
518  .. 
530  .. 


oil.    IN    THE    I > I  <    Villi    AREA 


10 


No.  18 — Concluded 

Black   shale    3  . . .  533    .  . 

Coal    (No.   5) 18  534  8 

Soli    crumbly   shale..      3  4  538    .. 

Clay    shale    5   .  .  .  543    .  . 

Clay  shale  with  hard 

bands    21    .  .  .  564   .  . 

Clay  shale   with  hard 

bands    18    ...  582 

Coal     3  6  585  6 

Sand  clay  shale  mixed  12  6  598    .  , 

Sand  clay  shale  mixed     2   ...  600    . . 

Elack    sandy    shale . .     2   . . .  602   . . 

Coal     15  603  5 

Clay  and  sandy  shale 

mixed    5  7  608    .  . 

Clay  and  sandy  shale 

mixed    18    ...  626 

Clav    shale 13  4  639  4 

Coal     12  640  6 

Mucky  shale 1  G  642    . . 

Mucky    shale    1    . .  .  643    . . 

Hard    sandstone    ....      9    ...  652    . . 

Black    shale    1    ...  653    . . 

Coal     3  653  3 

Black   shale    2  7  655 

Coal       mixed       with 

sulphur    2  5  658  3 

Fire  clay   16  659  9 

Clay  shale   4  3  664   . . 

Sandstone    4    . . .  668    . . 

Sandstone    and    sand 

shale  mixed    15   .  .  .  683    . . 

Flowing  salt  water  at 670    . . 

Clay  shale  with  hard 

bands    7  6  690  6 

Black   shale    2  3  692  9 

Coal     6  693  3 

Clay   shale    19  695   . . 

Clay    shale    12    .  .  .  707   . . 

Clay    shale    3    .  .  .  710    . . 

Sandstone  t 6    . . .  716   . . 

Black   shale    3    .  .  .  719   . . 

Coal     8  719  8 

Clay   shale    2  4  722   . . 

Clay   shale    14   . . .  736   . . 

Dark  shale    2   ...  738    . . 

Clay  shale   2    .  .  .  740   . . 

Coal     2  740  2 

Clav    shale    1  10  742   . . 

Coal     6  742  6 

Clay    shale    3  6  746   . . 

Dark  shale    3    .  .  .  749   . . 

Coal  and  sulphur 8  749  8 

Sandstone    and    sand 

shale     10  4  760   . . 

Dark  clay   shale 2   ...  762   . . 

Dark   clay   shale 3    ...  765   .. 

Black    shale    1   ...  772    . . 

Coal     8  772  8 

Clay    shale    3  4  776   . . 


Sandstone    3   . . .  779 

Sand  shale  10   ...  789 

Coal     3    ...  792 

Clay  shale 1    .  . .  793 

Sandstone    14    ...  807 

Sandstone    11    ...  818 

Sand    shale    and    clay 

shale  mixed    6   . . .  823 

Clay    shale    12   . .  .  835 

Sandstone     5    ...  840 

Sandstone  hard    10    ...  850 

No.  20 

Macon  County  Oil  and  Gas  Co. 

John   M.  Hill  farm 

WW.   V  NE.   i4.  sec.  .?.   T.  1.',  X..  R. 
2  E. 

Curb  elevation — 701  feet 

Thickness  Depth 

Feet  Feet 
Pleistocene  system 

Drift  sand,  gravel 1G0  160 

Pennsylvanian  system 

White  shale   50  210 

Blue   shale    45  255 

Limestone     5  260 

White  shale    40  300 

Blue   shale    30  330 

Black  shale    12  342 

White    shale    20  362 

Limestone     18  380 

Sandy  brown  shale 40  420 

White  shale    30  450 

Blue   shale    15  465 

Limestone     20  485 

White    shale    30  515 

Blue   shale    40  555 

Black   shale    15  570 

Blue  shale    20  590 

White  shale   15  605 

Limestone     5  610 

White  shale   4  614 

Limestone     6  620 

White  shale    30  650 

Limestone     - 2  652 

Coal    4  656 

Slate    1  657 

White  shale    30  687 

Horizon  of  No.  ~>  coal 

Black  shale    15  702 

Blue   shale    20  722 

White  shale   48  770 

Brown   shale    80  850 

Blue   shale    80  930 

Limestone     3  933 

Blue  shale    6  939 

Black    shale     61  1000 


MOULTRIE    COUNTY 


41 


Xo.  20 — Concluded 

Limestone        4  1004 

Black   shale    56  1060 

Gray    sandstone    and    salt 

water    45  1105 

Blue   shale    10  1115 

Mississippian  system 

Chester  series 

Limestone     8  1123 

Blue  shale    10  1133 

Brown  .shale    27  1160 

Limestone     2  1162 


Brown   shale    13  1175 

Blue  shale    6  1181 

Red  shale    12  1193 

Limestone     2  1195 

Red    shale    5  1200 

Blue  shale    18  1218 

Limestone     15  1233 

Blue  shale    5  1238 

Red  shale   10  1248 

Blue   shale    5  1253 

Sandstone     12  1265 

Red  shale    5  1270 

Blue   shale    6  1276 


MOULTBIE  COUNTY 


No.  16 


Moultrie  County  Coal  Company 

Lovington   well 

SE.  cor.,  SW.  %,  NE.  %,  sec.  27,  T. 
15  N.,  R.  J  E. 

Elevation,    top    of    shaft— 669.65    feet 

Thickness  Depth 

Ft.  in,  Ft.  in. 
Pleistocene  system 

Soil,   black    2    ...         2 

Clav,   yellow 12   . . .        11 

Clay,  blue     58   . . .       72 

Gravel    3    ...       75 

Hard  clay  and  gravel     8   . . .       83 

Gravel    7   .  . .       90 

Hard  clay  and  gravel  26    .  . .  116 

Sand     11   ...  127 

Clay,  red   5   ...  132 

Red  clay  and  gravel     13    .  . .  145 
Pennsylvanian   system 

Sand  rock   4   .  . .  149 

Sand  shale   4   . . .  153 

Sand   shale,    blue 29    .  . .  182 

Sand  shale   2   ...  184 

Sandstone     18  7  202  7 

Coal 10  203  5 

Sandstone     7  204   . . 

Clay   shale    7    .  . .  211    .  . 

Sandstone   4    . . .  215   . . 

Sand  shale,  blue 14  6  229  6 

Shale,  dark  with  sand- 
stone bands    13  6  243    .  . 

Shale,  blue   12  5  255  5 

Coal    2   ...  257  5 

Sand  shale   15  7  273   . . 

Shale,    dark   blue 24  8  297  8 

Slate,    fossiliferous.  .      14  299    . . 

Slate,    black 3  6  302  6 

Coal    1    .  . .  303  6 

Clay   shale    4  6  308    .  . 

Sandstone,   dark 23    .  . .  331    .  . 

Shale,    fossiliferous..      1    ...  332    .. 

Shale,    dark   blue 18  9  350  9 


Coal    3  351 

Fire  clay   2   ...  353 

Clay  shale    5   . . .  358 

Limestone     5    ...  363 

Clay   shale    6   . . .  369 

Conglomerate     3    .  . .  372 

Limestone     25  8  397  8 

Sand  shale,  dark 2  4  400   . . 

Sand  shale    11  10  411  10 

Coal    3  412  2 

Sand  shale  3  11  416  1 

Shale,  blue   9    .  ..  425  1 

Shale,    dark   blue 8  3  435  4 

Coal    1  435  5 

Shale,  dark  blue 6  5  439  10 

Coal    5  440  3 

Sand  shale,  blue 2  10  443  1 

Sand   shale   5   .  .  .  448  1 

Sandstone   5   ...  453  1 

Shale,    dark   blue 23  10  476  11 

Coal    8  477  5 

Clay   shale    4  6  481   11 

Limestone     1    ...  482  11 

Shale,  blue    2   ...  484  11 

Red  shale    5   .  .  .  489  11 

Shale,  blue   11  6  501  5 

Shale,  black 6  501  11 

Shale,    fossiliferous..      1  11  503  10 

Coal    13  505  1 

Clay  shale    3  10  508  11 

Sandstone,    shaly 10   .  .  .  518  11 

Sandstone,   dark 22   . . .  540  11 

Sandstone,    white.  ...    18    ...  558  11 

Sandstone    23    .  . .  581  11 

Shale,  blue   2  6  584  5 

Limestone,   nodular.  .     3  6  587  11 

Limestone     5  7  593  6 

Shale,  black   1   . . .  594  6 

Shale,  dark  blue 10  5  604  11 

Clay  shale 3    .  . .  607  11 

Shale,  blue   3    . . .  611   . . 

Sandstone   16    .  . .  627   . . 

Shale,  blue   1    .  . .  628    .  . 

Shale,    dark   blue 14  6  642  6 

Shale,  black 3  2  645   .  . 

Coal    6  646  6 


I -J 


OIL    IX   THE    DEOATUB   Ai;i:.\ 


No.  Hi — Concluded 


Clay   shale    

Sandstone  

Shale,  blue  

Sandstone  

Shale,  blue   

Sandstone     

Sandstone,  shale  part 

ings    

Sand  shale,  dark.  . .  . 

Shale,  dark  blue 

Shale,  black 

Coal    

Clay   shale    

Sand    shale,    blue.  .  . . 

Sand  shale    

Limestone     

Shale,  blue 

Limestone     

Shale,  dark  blue 

Shale,  gray 

Sandstone   

Sandstone,  dark    .... 

Shale,  dark  blue 

Shale,  black 

Shale,  blue   

Shale,  dark  blue. . . . 
dark  blue. . . . 
blue   


in 


1  6 
12  10 

1  8 


partings. 


Shale 

Shale 

Coal 

Shale 

Coal 

Limestone,   blue 

Clay    shale 

Slate,  black    . . . 

Limestone,    blue 

Slate,  black   .  . . 

Coal   (No.  6)... 

Sandstone    


6 

2 

11 

4 

1 


o  <; 

2  4 

8  10 

8  4 


652 
656 
657 
664 
657 
664 

675 

est 

714 

715 

716 

718 

72?, 

732 

740 

741 

75  4 

756 

763 

782 

801 

825 

830 

840 

850 

866 

873  6 

876  8 

878  7 

879  11 


894  .. 
900  6 
902  .  . 
911  8 
920  .  . 


No.  26 

Well  near  Bethany 

NE.   <or..   NE.    ',,  NW.  %,  see.  .?.   T. 
18  X..  /,'.    ',   E. 

Curb  elevation — 585+  feet 

Thickness  Depth 

Feet  Fiit 
Pleistocene  system 

Soil      3  3 

Clay    32  35 

Sand     30  65 

Pennsylvanian  system 

Shite     35  100 

Coal     2  102 

Shite     48  150 

Lime     15  165 

Slate     5  17n 


Lime     10 

Coal    6 

Water    sand,    hole    full    of 

water    14 

Blue  mud    25 

Blue  mud    5 

Lime    5 

Blue  mud    5 

Lime     40 

Blue  mud    70 

Red    rock    20 

Slate,   blue    15 

Slate,  white   35 

Lime    5 

Salt     sand,     hole     full     of 

water    35 

Shale,    gray    5 

Lime,  white    5 

Shale,   blue    15 

Lime     5 

Slate,  white  40 

Lime,    white,    sandy 5 

Shale,    blue    15 

Slate,  white   25 

Slate,   blue    15 

Slate,  white   25 

Lime,    white    10 

Shale,   white    75 

Slate,  black   30 

Lime,   blue    10 

Slate,  blue    60 

Lime,     white,     with     thin 

coal    seams    75 

Slate,  white    25 

Slate,  black    25 

Slate,    white    45 

Slate,    dark    30 

Slate,  white   20 

Shale,    brown    6 

Slate,     black,     horizon     of 

No.    5    coal 24 

Slate,    white     25 

Slate,  dark   40 

Shale,   white    20 

Lime,    broken    10 

Slate,    white     50 

Lime,    white.      Set    8-inch 
casing,    underreamed    to 

1500;    5    bailers   water..  10 

Sand,  white    20 

Lime,    coarse,    gray 10 

Slate,  sandy,  gray 35 

Slate,    white    25 

Shale,    dark,    sandy 25 

Lime    shale    5 

Slate,    dark    10 

Sandy   lime    10 

Slate     25 

Shale,  white,  bad  dry  cave  25 
Slate,  sandy;    set  6%-inch 
casing    at    1410;     under- 
reamed    to    1650 20 


180 
186 

200 
225 

230 
2::  5 
240 
280 
350 
370 

420 
425 

460 
165 

47» 
485 
490 
530 
5:;  5 
550 
575 
590 
615 

l  VI 5 

700 

730 

740 
800 

875 

900 

925 

970 

1000 

102'! 

1026 

L050 

1075 
1120 
1140 
1150 
1200 


1210 
1230 
1240 
1275 
1300 
1325 
1330 
1340 
1350 
1375 
1400 


1420 


PIATT    COUNTY 


43 


No.  26 — Concluded 

Slate,   blue,    cavy 30  1450 

Shale,   blue   sandy 55  1505 

Mississippian  system 

Upper  Mississippian  sub-system, 
Chester  series 
Lime,       white;        8%-inch 
casing    at    1490;     (Well 

dry")    5  1510 

Slate,  blue    10  1520 

Red   rock    30  1550 

Lime,  brown    40  1590 

Slate,    sandy    40  1630 

Red   cave    15  1645 

Sand,  white   5  1650 

Red    rock,    casing    under- 
reamed    to    1650 5  1655 

Sand,    white     10  1665 

Slate,  red    10  1675 

Slate,   brown    25  1700 

Lime,    gray    25  1725 

Slate,  blue    10  1735 

Sand,    white    5  1740 

Shale,  red   5  1745 


Lime,     gray,     with     slate 

seams     30 

Lower  Mississippian  system 

Lime,  blue    25 

Lime     40 

Lime,  white,   fine 15 

Lime,    coarse,    gray 5 

Lime,    gray    15 

Lime,   brown    25 

Lime,  brown  and  black...    50 

Lime,   brown    25 

Lime,   white,   coarse 15 

Lime,  brown,  coarse 10 

Lime,  gray,  fine 40 

Lime,   brown,   fine 10 

Lime,  brown,  15  bailers  of 

water    25 

Lime,    brown,    500    feet    of 

water    15 

Lime,   brown    15 

Lime,   brown,   hole   full   of 

water    20 

Lime,  gray  ? 

Lime,    gray,    sandy 23? 


PIATT  COUNTY 


No.  2 


J.  L.  Apple  Oil  Prospecting  Co. 
N.  G.  Pattcngill  farm — Xo.  1 

SW.   i4,  SE.  V±,  sec.  3,   T.  11  N.,  R. 

■i  E. 

Curb  elevation — 641  feet 

Thickness  Depth 

Feet  Feet 
Pleistocene  system 

Clay  and  gravel 25  25 

Sand     15  40 

Cement  gray  el  20  60 

Quicksand     10  70 

Cement  gravel 20  90 

Quicksand     15  105 

Cement  gravel 25  130 

Quicksand     7  137 

Clay,  gravel   8  145 

Quicksand     10  155 

Water  gravel   5  160 

Pennsylvanian  system 

White    lime    (?) 17  177 

White  mud 23  200 

Black   shale    10  210 

Coal    1  211 

Shale,  brown     24  235 

Shale,  black     25  260 

Shale,    white    40  300 

Shale,  black     20  320 

Shale,  gritty    40  360 

Shale,  white     20  380 


Shale,  gritty    

Shale,  black     

Shale,  gritty    

Shale,  black     

Shale,  white     

Shale,  black     

Limestone,   brown    

Shale,  white     

Shale,  black     

Coal    (No.  5) 

Shale,  white     

Shale,  brown   

Shale,  black   

Shale,  brown    

Shale,  black     

Shale,  white     

Shale,  black     

Limestone,   brown    

Shale,  brown    

Shale,  gritty    

Shale,  black     

Slate,   black    

Shale,  brown    

Miss iss ipp ia n   system 

Upper  Mississippian  sub- 

Limestone,   brown    

Shale,  red   

Slate,  gritty    

Red  rock  

Slate,  gritty   

Limestone,  white    

Sand  and  salt  water 

Lower  Mississippian  sub 

Limestone,  white    

Limestone,  brown     


30 
50 
40 
30 
20 
10 
10 
50 
15 
2 
63 
50 
50 
40 
30 
20 
20 
40 
30 
55 
25 
20 
30 


1775 

1800 
1840 
1855 
1860 
1875 
1900 
1950 
1975 
1990 
2000 
2040 
2050 

2075 

2090 
2105 

2125 

2150 


410 
460 
500 
530 
550 
560 
570 
620 
635 
637 
690 
740 
790 
830 
860 
880 
900 
940 
970 
1025 
1050 
1070 
1100 


system 
40       1140 


70 
20 
35 
5 
10 
55 


1210 
1230 
1265 
1270 
1280 
1335 


system 
15   1350 
50   1400 


I  I  OIL  IN   TIIK    DECATDE    AIM- A 

SANGAMON  COUNTY 

No.  L5 

Mechanicsiurg  Coal  Compaiui 

NE.  cor.,  NW.  " ,.  NE.  Vi,  sec.  26,  T.  16  X..  R.  S  W. 

Curb  "elevation — 585   feet 

Depth 
Feet 

Base  of  No.  6  coal 277 

Ease  of  No.  5  coal 305 


CHER'S" 

LIBRARY  BINDERS 

50?  S.Goodwin 

Urbana,  fli. 


JB 


SB 


m 

1 

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